[必备]英语演讲稿带翻译12篇

演讲稿具有观点鲜明,内容具有鼓动性的特点。在现在的社会生活中,演讲稿的使用频率越来越高,在写之前,可以先参考范文,下面是小编帮大家整理的[必备]英语演讲稿带翻译,供大家参考借鉴,希望可以帮助到有需要的朋友。

Mostpeoplewouldliketobepopularwithothers,butnoteveryonecanachievethisgoal.WhatisthesecrettopopularityInfact,itisverysimple.Thefirststepistoimproveourappearance.Weshouldalwaysmakesurethatwestayingoodshapeanddresswell.Whenwearehealthyandwell-groomed,wewillnotonlylookbetterbutalsofeelbetter.Inaddition,weshouldsmileandappearfriendly.Afterall,ourfacialexpressionisanimportantpartofourappearance.Ifwecandothis,peoplewillbeattractedtoourgoodlooksandimpressedbyourconfidence.

Anotherimportantstepisdevelopingmoreconsiderationforothers.Weshouldalwaysputothersfirstandplacetheirinterestsbeforeourown.Itsalsoimportanttobegoodlisteners;inthiswaypeoplewillfeelcomfortableenoughtoconfideinus.However,nomatterwhatwedo,wemustnotgossip.Aboveall,wemustremembertobeourselves,notphonies.Onlybybeingsincereandrespectfulofotherscanweearntheirrespect.Ifwecandoalloftheabove,Iamsurepopularitywillcomeourway.

如何才能受人欢迎

大部分的人都想受人欢迎,但是并非每个人都能达到目标。受欢迎的秘诀何在事实上是很简单的。步骤一,先改善我们的外表。我们得确保自己很健康,并且穿着体面。当我们既健康又穿戴整齐时,不仅看起来更有精神,自己也会觉得好多了。此外,我们要保持微笑并表现得很友善。毕竟,脸部表情是外观很重要的一环。如果我们能做到这一点,别人会被我们的美好外表所吸引,并对我们的自信印象深刻。

另一个重要步骤,就是培养对别人的体贴。永远以他人为重,并把别人的利益放在自己的利益之前。当个好听众也是很重要的`;如此一来,别人才能很自在地对我们吐露心事。然而,不管我们做什么事,绝对不要说闲言闲语。最重要的是,要做自己,不要当虚伪的人。只有对人真诚又尊重时,才能赢得他人的尊敬。如果我们能做到以上几点,我相信受人欢迎是指日可待的事。

MyAttitudetowardstoMarks我的分数观

Forourstudents,marksisaboveeverything.Teacherswilljudgeusfromourmarks.Withmarkswecanbeenrolledintojuniormiddleschools.Withmarks,wecanbeenrolledintoseniormiddleschools.Withmarkswecanbeenrolledintocollege.Withmarkswecanbeenrolledintopostgraduateanddoctrinestudies.Stillwithmarkswecanbegradedandbeallowedtogoabroadforfurtherstudies.Ourparentswillbestrictwithuswiththemarks.Oursocietyjudgeusfrommarks.However,sometimeswestudentscompareoneanotherwithmarksdirectly.Wearecompletelycontrolledbymarks.Welikethemandwefeelsorryforthem.ButwhatattitudetowardsourmarksshouldwetakeTruly,marksfunctionscannotbeunderestimated.Intermsoftestinourstudy,marksarefairandreal.ThatisthereasonwhywesayEveryoneisequalbeforemarks.

However,Ithinkmarksarethesolestandardtojudgethesuccessorfailureofstudentsinexams.Sometimes,marksmorethantenorlessthanoneortwoinourexamscomparingwithothersmeannoteverything.Thesuccessorfailureinexamswillbeinfluencedbyexperienceonthespotandtheexaminee’shealthetc.Onceinawhileonecannotfailinexams.Successorfailureiscommonsenseformilitary.Ithinkeveryoneisfamiliarwiththefamoussaying.Don’tyouthinksuchwillbethecasewithourstudyInexams,onecannotbenever-defeatedgeneral.Eventhoughonewillbeverygoodineverydaystudy,hecannotsucceedineveryexamsometimes.WecangetprooffromthefactthattheverybestonewecallNumberOneScholarintheentranceexamsforcollegeandordinarymiddleschoolandspecializedsecondaryschoolovertheyearsisnoteminentaboveallothersnortopstudentineverystudy.

Asamatteroffact,highmarksandabilityarenotunified.Sometime

ago,anewphrasehighmarksbutpoorcompetencecameintobeing.OnceIhappenedtomeetsuchateacherasthis.Itissaidthattheteacherjustgraduatedfromafar-famedkeyuniversity.Buthisteachingresultismuchlessthanthatoftheonewhojustgraduatedfromanot-well-renownedcollege.Whenlecturing,theteacheronlyrepeatedwhatthetext-bookssays,whichwasverydullsothehisstudents’interestinlearningwasnotaroused.Histeachingwasshortofunityofteachingandlearning.Atpresentthereisafactthatweknowafewbrilliantandtopcollegegraduatesarenotqualifiedfortheirposts.Thereasonforitmaybelackoftheabilitytocombineknowledgelearntfrombookswithpragmaticsintheirwork.Studentsofthiskindwillbesuccessfulineveryexambuttheywillbeabletousefreelytheirknowledgeintheirposts.Don’tyouthinkitwastetrainingsuchpersonsforthecountry

Tosumupfromtheabove,Icansaymarksarenotabsolutelyauthoritativeforsome.Ifweneglecttraininganddevelopingthestudents’abilityandcompetenceandifweonlyseekforthehighmarks,wewillbeabsolutelywrong.Weshouldtakeanobjectiveattitudetowardsthemarks.NeithershouldweneglectthemnorshouldweovervaluethemlikeaGod.

分数,对于我们学生来说,是至关重要的了。老师要用分数来衡量我们—上初中,要分数;上高中,要分数;上大学要分数,考研究生、博士要分数,出国、评职称还是要分数。家长要用分数来要求我们;社会用分数来衡量我们。

而我们自己也常常用分数在相互直接做着攀比。我们完全为分数所左右了,我们为它欢喜,我们为它丧气。那么,我们应该怎样对待分数呢

的确,分数有它不可低估的作用。从检验学习的角度上来说,它具有一定的公平性和真实性,“分数面前人人平等”,讲的就是这个道理。然而,分数并不是估量一个学生成败得失的惟一标准。考试成绩偶尔低了一两分乃至十来分,并不一定说明什么问题。考试的成败有时也会受到诸如临场经验、健康状况等方面的影响。“胜败乃是兵家常事”这句话大概不会有人不知道,而我们在学习上又何尝不如此在考试上很少有“常胜之师”,即使平时成绩再好的同学,也难免会有偶尔的.失误。历届中考、高考“状元”并非就是平时出类拔萃的优等生的事实,便是明证。

知识。国家培养出这样的“人材”,不也是一种浪费吗

由此可见,分数并不如有些人想象得那么绝对和,忽视了对各方面才能的培养,只一味追求高分,是不行的。因此,我们应该客观地去看待分数,既不应过分轻视它,也没有必要把它看得过于神圣。

InOtherWays

其他开场方式欣赏

TodayIcometoOsloasatrustee,inspiredandwithreneweddedicationtohumanity;Iacceptthisprizeonbehalfofallmenwholovedpeaceandbrotherhood.IsayIcomeasatrustee,forinthedepthsofmyheartIamawarethatthisprizeismuchmorethananhonortomepersonally.

今天,我以受托人的身份来到奥斯陆,心情激动,充满了献身人类的新勇气。我代表所有热爱和平与兄弟情谊的人们接受这个奖。我之所以以受托人的身份来到这里,是因为,在我的内心深处,我意识到这个奖决不仅仅是我个人的荣誉。

Theroadofhistoryisnotlevelandsmoothallalong.Sometimesthepathwillcometoadangerousanddifficultplace.

Itisonlywiththevaliantandgallantspiritofthetravelersthatitcanbepassedthrough.

ThevastandmightyYangtziRiver,whenitcomestoanendless,broadplain,willflowtenthousandmilesinarapidcurrent.Butasitreachesanarrowvalleywithhighrangesofmountains,cliffsandprecipicesonbothsides,whichlookdangerouslysteep,theriverhastoforceitswaythroughtheminawinding,tortuouscourse.Thesameisthecasewiththedevelopingcourseofanationshistory.

Thehistoryofhumanraceislikegoingonajourney.Someoftheplacesthetravelerpassesthrougharesmoothandlevelpianos,andothersaredangerousandruggedpaths.Theexperiencedtravelers,whentheymovedontoabroad,levelroad,willnaturallywalkalongwithalightheart,butwhiletheyarepassingthrougharuggedplacetheywillallthemorebeseizedwithcuriosity,andinsuchanextremelyfantasticandmagnificentrealm,willallthemorefeelasortofpleasureinanadventure.

历史的道路,不总是平坦的,有时会变得艰难险阻。这只能靠英勇无畏的`精神才能够冲过去。

一条浩浩荡荡的长江大河,有时流到很宽阔的境界,一望无际,一泻千里。有时流到很逼狭的境界,两岸丛山叠岭,绝壁断崖,江河流于其间,曲折迂回,极为险峻。民族生命的进展,其历程亦复如是。

人类在历的生活正如旅行一样。旅途上的征人所经过的地方有时是坦荡平原,有时是崎岖险路。老于旅途的人,走到平坦的地方固是高高兴兴地向前走,走到崎岖的境界,愈是奇趣横生,觉得在此奇艳壮绝的境界,愈能感得一种冒险的美趣。

dumplingisatraditionalchinesefood.Onthelunarnewyearsdaymostfamiliesmakealotofdeliciousdumplings.Tomakethemfollowthiseasyprocess.

饺子是中国的传统食物。在农历新年,大多数家庭都会包很多美味的饺子。要包成饺子,遵循以下那容易的步骤。

Thefirststepistomixtheflourwithwater.whenthedoughisreadywecanbegintomakedumplingwrappers.weusearollingpoletorollthedoughintosmallthinandroundpiecessothattheywillbeeasytocook.whenthewrappersaredoneitstimetopreparethefilling.Usuallyweusemeatsuchasbeeformuttonandsomevegetablessuchascabbageorcarrotsforfilling.Youmayactuallychoosewhateveryouliketoputintoit.wemustchopthosethingsintosmallpieces.Thenputsomesaltoilandothercondimentsintoitandstiritevenly.Whenallthesepreparationsaredonewecanstartmakingdumplings.Firstputaspoonfuloffillinginthecenterofthewrapper.Thenstickthetwooppositesidestogetherandthentherest.Dontjustcoverthefillingwiththewrappers.Thebestshapeofdumplingsisthatofashipbecausewhentheyareboilinginthepantheylooklikeshipssailinginthesea.Thesmellcanmakeyourmouthwater.

x步就是把面粉和水和在一起。和好面之后,我们可以开始擀皮。我们使用一个滚动杆,把它揉成又薄又小的圆形面皮,这样会比较容易煮。皮弄完后,就是弄馅的时候了。通常我们用肉(比如牛肉和羊肉)还有蔬菜(比如白菜和胡萝卜)作馅。你可能选择任何你喜欢的馅包进去。我们必须把这些东西剁小。然后放上盐,油和其他调料搅拌它均匀。当所有这些准备工作都完成了我们就可以开始包饺子了。首先放一勺馅在皮的中心。然后把两个相反的两边粘在一起,然后就是其他的'了。不只是只是把馅包在皮里面。饺子x好看的形状是像一艘船,因为当它们在锅里煮时,他们看起来就像是大海里的船只。它们的香味会让你流口水。

AChiefExecutiveofficerisnotnecessarilysomeonewhohashadalotofformaltraining.So,Idoubtmoreschoolingwouldhelpyouclimbupthatladderofsuccess.

Maybeyoushouldtryandchangeyourworkhabitsorcharacter.You

cannotjustsitaroundinanorganizationwaitingforpeopletopromoteyou.Youhavetoletpeopleknowyouareambitiousandwaitingforbiggerandmorerewardingchallenges.Youshouldtellyoursupervisororbossthatyouwanttobepromotedandriseupthatmanagementladder.Agoodmanagerwillaccept,evenrespectthefactthatyouwishforcareerdevelopment.Ifthisisnotthecase,youshouldfindanewjobornewcompanythatwillallowyoutogrow.

Youmuststartoutsmall.Hopingthatonedayyouwillsuddenly

becomedirectorofacompanyisdoubtful.Gettingreadyforaslowascentismorelikely.Acceptit,andcommityourself,realizingthatitmaybealongclimb.

Youwillneedsomeskillstopropelyouupthatladderofsuccess.Youmustbecompetent,thatisyouneedtodevelopskillsinmanyareas,suchasmarketing,humanresources,publicrelationsandfinances.

Youmustalsobeagoodpeopleperson,alwayscultivatingrelationshipswiththepeoplearoundyou.Having“guanxi”isanecessarycharacteristicofanysuccessfulCEO.

公司的首席执行官未必都是经过许多正规培训的人。所以,我认为接受更多的学校教育未必就能促使你在成功的阶梯上步步高升。

也许,你应该试着改变工作习惯或性格。不能仅仅在一个单位里坐等别人来提升你。必须让人们知道你胸怀大志,正在等待更大的、回报更多的挑战。应该告诉你的上司或老板:你想得到提拔,登上管理者的阶层。一位好经理将会理解,甚重你发展~业的愿望。假如情况不是这样的话,你就应该另谋{就,以使自己得到发展。

必须从小处开始做起。幻想着有一天突然当上某公司的领导是不太现实的.。作好准备慢慢地升迁,可能性更大。接受现实,全力以赴,要意识到这可能是一种漫长的攀登。

你需要掌握一些促使自己往上爬升的技能。你必须具备胜任工作的各种能力。换句话说,你必须具备诸如市场营销、人力资源、公关和财务等方面的技能。

你也必须要有良好的人缘,营造与周围的人黻洽的关系,好的"关系"是任何一位成功的首席执行官必备的要素。

Hello,everyone.Itisagreathonorformetobeheretoexpressmyfeelings.

Myfriends,itistimeforustosaygoodbye.However,Iwillneverforgetthegoldendaysofjuniorhighschool.Theyareforeverlockedinmymemories!Inthepastthreeyears,IamgratefulthatIcouldstudywithyou.

Firstofall,I’dliketothankallmyteachers.It’syouthatletmekonwhowtobeagoodperson.Fromyou,Iknowthatasagoodstudent,weshouldnotonlystudyhard,butalsomeanwellandhelpeachother.Then,I’dlikeshowmyappreciationtoallmyfriends.IamgratefulthatIcouldstudywithyou.Beingtogetherwithyou,Icantotallybemyself.Idonotneedtohideanythingfromyou.WhenIamsad,youarealwaysonmysidetocheermeup.

Wewillsoonbecomeseniorhighschoolstudents.Wemustgoforward,toadifferentworld,wearenolongerthechildren,whoonlywanttoplayfunwitheachother.Wegrowupfromnowon!Itisalongjourney,butletusbegin!

你好,每个人。我很荣幸在这里表达自己的感情。

首先,我想感谢我所有的老师。是你们,让我知道如何成为一个好人。从你们那,我知道作为一个好学生,我们不仅应该努力学习,也要互相帮助。然后,我想对我所有的`朋友们表示衷心的感谢。我很感激我能和你一起学习。和你在一起,我完全可以做我自己。我不需要你隐瞒任何事情。当我伤心的时候,你总是在我身边使我振作。

我们将很快成为高中生。我们必须前进,在不同的世界里,我们不再是孩子,只想和对方快乐地玩的孩子。我们长大了,从现在开始!这是一个漫长的旅程,但让我们开始吧!

世界是我们的,未来是我们的

Someonesaid“wearereadingthefirstverseofthefirstchapterofabook,whosepagesareinfinite”.Idon’tknowwhowrotethesewords,butI’vealwayslikedthemasareminderthatthefuturecanbeanythingwewantittobe.Weareallinthepositionofthefarmers.Ifweplantagoodseed,wereapagoodharvest.Ifweplantnothingatall,weharvestnothingatall.

一些人说“我们正在读一本无穷的书中的第一章的第一节.”我不知道谁写了这些话,但是我一直很喜欢它,因为它提醒了我,我们能够创造我们想要的未来.

Weareyoung.“Howtospendtheyouth?”Itisameaningfulquestion.Toanswerit,firstIhavetoask“whatdoyouunderstandbythewordyouth?”Youthisnotatimeoflife,it’sastateofmind.It’snotamatterofrosycheeks,redlipsorsuppleknees.It’sthematterofthewill.It’sthefreshnessofthedeepspringoflife.

我们都是农夫.如果我们播下好的种子,我们将会丰收.如果我们的种子很差,有很多草籽,收割的将是无用的庄稼.如果我们什么也不播种,什么收获也没有.

Youthmeansatemperamentalpredominanceofcourageovertimidityoftheappetite,foradventureovertheloveofease.Thisoftenexistsinamanof60morethanaboyof20.Nobodygrowsoldmerelybyanumberofyears.Wegrowoldbydesertingourideals.Yearswrinkletheskin,buttogiveupenthusiasmwrinklesthesoul.Worry,fear,self–distrustbowstheheartandturnsthespiritbacktodust.

我们是年轻的“怎样度过青春?”这是个有意义的问题.为了去回答它,我首先要问“从‘青春’这个词中你能理解到什么?”青春不是人生的一个时期,而是精神的一种状态.青春不是桃面、丹唇、柔膝,而是深沉的意志,.青春是生命的深泉在涌流.

Whether60of16,thereisineveryhumanbeing‘sheartthelureofwonders,theunfailingchildlikeappetiteofwhat’snextandthejoyofthegameofliving.Inthecenterofyourheartandmyheartthere’sawirelessstation:solongasitreceivesmessagesofbeauty,hope,cheer,courageandpowerfrommenandfromtheinfinite,solongasyouareyoung.

Apoetsaid“Toseeaworldinagrainofsand,andaheaveninawildflower,holdinfinityinthepalmofyourhand,andeternityinanhour.Severaldaysago,Ihadachancetolistentoalecture.Ilearntalotthere.I’dliketoshareitwithallofyou.Let’sshowourrightpalms.Wecanseethreelinesthatshowhowourlove.careerandlifeis.Ihaveashortlineoflife.Whataboutyours?Iwonderedwhetherwecouldseeourfutureinthisway.Well,let’smakeafist.Whereisourfuture?Whereisourlove,career,andlife?Tellme.Yeah,itisinourhands.Itisheldinourselves.

一位诗人说“从一粒沙看世界,从一朵花看天堂,把无限放在你的手掌,永恒在一刹那里收藏”.几天前,我有了一个听讲座的机会,从中我学到了很多东西.现在,我想把这些与大家共享.让我们伸出右手,我们可以看到手掌中的展示我们的爱,事业和生活的三条线.我在生活方面这条线很短,那你们的呢?我想知道我们是否可以用这种办法去看我们的.未来.好的,让我们一起握拳.我们的未来在哪儿?我们的爱、事业和生活在哪儿?告诉我!是的,它们就在我们的手中.它们被我们自己掌握着.

Weallwantthefuturetobebetterthanthepast.Butthefuturecangobetteritself.Don’tcrybecauseitisover,smilebecauseithappened.Fromthepast,we’velearntthatthelifeistough,butwearetougher.We’velearntthatwecan’tchoosehowwefeel,butwecanchoosewhataboutit.Failuredoesn’tmeanyoudon’thaveit,itdoesmeanyoushoulddoitinadifferentway.Failuredoesn’tmeanyoushouldgiveup,itdoesmeanyoumusttryharder.

AswhatIsaidatthebeginning,“wearereadingthefirstverseofthefirstchapterofabook,whosepagesareinfinite”.Thepasthasgone.Nothingwedowillchangeit.Butthefutureisinfrontofus.Believethatwhatwegivetotheworld,theworldwillgivetous.Andfromtodayon,let’sbetheownersofourselves,andspeakout“Wearetheworld,wearethefuture.”

正如我在前面所说的“我们正在读一本无穷的书中的第一章的第一节.”过去的已经过去,无论我们无力改变,但是未来却在我们前方.相信“我们给了世界什么,世界也将给我们”.并且从今天起,让我们一起做我们自己的主人,一起大声说出“世界是我们的,未来是我们的”

withthedevelopmentofscienceandtechnology,changehaspenetratedintoeveryaspectofourdailylife.toillustratethat,idliketomakeacomparisonofthesetwoseeminglyinsignificantthings:milkmanandmailman,whosedifferencesindicateourchangingwayoflivingwiththetimes.

homemilkdeliveryhasalmostgoneextinctinchinanow,alsogonewithitarethemilkmen,whooncedeliveredbottledfreshmilkdoor-to-door.ontheotherhand,mailmansbusinessorthecourierservicehasthrivedasonlineshoppinggainspopularity.however,inretrospect,ifindsomethinghasbeenlostinthistransition,somethingshakespearecalledas“themilkofhumankindness”。

wheniwasakid,milkwasntforsaleeverywhere.forthefamilieswhoneedit,theydependedonthemilkmentotakeitfromthelocaldairyfarmstotheirhouses.inourneighborhood,therewassuchamilkman,whosearrivalwasmuchanticipatedbythechildrenandalwaysbroughtuslaughterandjoy.heknewthenameofeverykidandcouldeasilyseethroughourtricks.ifwedidntbehave,hewouldsidewithourparentsandthreatentorobusofthenutritiousdrink.theentireneighborhoodwasacquaintedwithhim;sawhimasamemberofthecommunityjustlikethemanyresidentsorstreetvendors.therewasabondbetweenallofusforitwasnotonlythecommoditiesthatbeentransacted,butalsoasenseofcaringanddependability.andthatsmallboxfixedontoourdoor,otherthanbeingadrop-offpointformilk;itwasacommunicationjunctionbetweenthepeopleaswetooktheinitiativetoreachouttoothers.

fastforwardtotoday,milkisubiquitouswithnodedicateddeliverysystem.buttheconveniencelevelofourlivehasgoneupanotch.almosteverythingisforsaleonline,whichsparesusallthetravellingandtalking.withafewreadyclicks,shoppingisdone.therestisleftforthosespeeddeliverycompanies.usuallyitsagrumpymailman,whoreachesusthroughcellphone,urgingeveryonetopickuptheirparcelsassoonaspossible.andtheminutethereceiptissigned,werushbacktounpackwhilethecourierdashestothenextdestination.thereisbarelyaconversationcarriedout,nordowefeeltheneedtotalktosuchastranger,whochangesfromtimetotimefrequently.itseemsthatpeoplearealwaysinahurrynow,thoughwehavemoreconveniences,stillwerunshortoftimetostopandstare,tospeakandshare.

callmeanold-timer,butithinkthepersonaltouchrepresentedbythemilkmaniswhathasbeenmissinginthemodernsociety.williamwordsworthoncewrotethat“gettingandspending,welaywasteourpowers.”moderntechnologymayhavemultipliedourpossessionsorgaveusmoreconveniences,butweruntheriskofreducingourvaluesifwelaywasteourpowerofinterpersonalrelationships.

随着科学技术的发展,变化已经渗透到我们日常生活的方方面面。要说明的是,我想让这两个看似不起眼的东西比较:牛奶,邮递员,其差异表明我们与时代生活方式的改变。

家里的牛奶几乎已经灭绝,现在在中国,它也消失了的送奶工,曾送瓶装草原鲜奶送货上门。另一方面,邮递员的业务或快递服务的蓬勃发展,网上购物的普及。然而,回想起来,我发现在这一转变中,有了一些东西,莎士比亚称之为“人类之奶”。

当我还是个孩子的时候,牛奶不是到处都卖。对于那些有需要的家庭来说,他们只能依靠送奶工把它从当地的乳品农场房子。在我们的附近,有这样一个送牛奶的人,他们的到来,是孩子们期待已久的,总是给我们带来笑声和欢乐。他知道每一个孩子的名字,可以很容易地通过我们的把戏。如果我们不守规矩,他会和我们的父母一起威胁要抢我们的营养饮料。整个社区都与他熟识,他认为他是社会上的一员,就像许多居民和街头小贩一样。有一个我们之间的.结合不仅是被交易的商品,也有关心和信任。和那个小盒子固定在我们的门,而不是一个下降点牛奶,它是一个沟通的人之间的交界处,我们采取了主动接触其他人。

叫我老古董,但我认为送奶工为代表的个人风格是什么一直在现代社会中失踪。华兹华斯威廉曾写道:“获取和消费,我们浪费我们的权力。”现代科技可能会增加我们的财产,或者给我们更多的便利,但是我们冒风险的减少我们的价值,如果我们浪费我们的人际关系的力量。

Theoperational[preinl]amplifier[mplfa]isanextremelyefficientandversatile[v:stail]通用device.Itsapplicationsspanthebroadelectronicindustryfillingrequirementsforsignalconditioning,specialtransferfunctions,analog[nl:g]模拟instrumentation,analogcomputation,andspecialsystemsdesign.Theanalogassets[set]ofsimplicity[simplisiti]andprecisioncharacterizecircuits

[s:kit]utilizing[ju:tilaiz]operationalamplifiers.

运算放大器是一个非常有效和通用设备。它的应用范围广泛的电子工业,信号调理,专项转移功能,模拟仪表,模拟计算,及特殊系统设计的灌装要求。简单性和精确度是使用运算放大器的模拟电路特点

TheFeedbackTechnique

Theprecisionandflexibilityoftheoperationalamplifierisadirectresultoftheuseofnegativefeedback.Generallyspeaking,amplifiersemployingfeedbackwillhavesuperioroperatingcharacteristicsatasacrifice[skrifais]ofgain.

在运算放大器的精度和灵活性是利用负反馈的直接结果。一般来说,采用反馈的放大器有卓越的经营特点,在牺牲增益的代价下。

Withenoughfeedback,theclosedloopamplifiercharacteristicsbecomeafunctionofthefeedbackelements.Inthetypicalfeedbackcircuit,figure1,thefeedbackelementsaretworesistors.Theprecisionofthe“closedloop”gainissetbytheratio[reiiu]比率ofthetworesistorsandispracticallyindependentofthe“openloop”amplifier.Thus,amplificationtoalmostanydegreeofprecisioncanbeachievedwithease.

有了足够的反馈,闭环放大器的特点成为一个功能的反馈元件。在典型的反馈电路中,图1中,反馈元件是两个电阻器。的精度的“闭环”的增益设置的两个电阻的比率实际上是独立的“开环”放大器。因此,放大到几乎任何的精确度,可以容易地实现。

Notation符号

=Symbol(a)isabuffer[bf]缓冲器op工作amp放大器

=Symbol(b)isadifferentialinput,singleendedoutputopamp.Thissymbolrepresentsthemostcommontypesofopamps,includingvoltagefeedback,andcurrentfeedback.Itisoftentimespicturedwiththenon-invertinginputatthetopandtheinvertinginputatthebottom.

=Symbol(c)isadifferentialinput,differentialoutputopamp.Theoutputscanbethoughtofas“inverting”[inv:t]反转and“non-inverting”,andareshownacrossfrom

theopposite[pzit]相反polarity[plrti]极性inputforeasycompletion

[kmpli:n]完成offeedbackloopsonschematics[ski:mtk].

符号(a)是一个缓冲器的运算放大器

=符号(C)是差分输入,差分输出运算放大器。输出可以被认为是“反转”和“非反相”,并示出从相反的极性的输入对面容易完成的`反馈回路原理图

PowerConnections电源连接

Powerissuppliedtoeachoftheseunitsatconnectionsasshowninfigure4.Suchaconnectionisimpliedinalloperationalamplifiercircuits.Thedual[dju:l]两部分

supplypresentsthesameabsolutevalueofvoltagetogroundfromeitherside,whilethecenterconnectionultimately[ltimtli]最宗definesthecommonlineandgroundpotential.TheexceptionstothisareACamplifiercircuitsthatmayuseasinglepowersupply.Thisisaccomplishedbycreatingafloating[flt]ACgroundwithDCblockingcapacitors.Insuchcircuits,asourceof“half-supply”createsa“virtualground”exactlyhalfwaybetweenthepositivesupplyandgroundpotentials.

ElectricalCircuitModels电气电路模型

Thesimplifiedmodelsofthedifferential[dfrenl]差分inputoperationalamplifiersareshowninfigures6and7.

在图6和图7中示出的差分输入运算放大器的简化模型。

Asindicatedinfigure6,theoperationalamplifiercanberepresentedbyanidealvoltagesourcewhosevaluedependsontheinputvoltageappearingacrosstheinvertingandnon-invertinginputsplustheeffectsoffinite[fainait]有限inputandoutputimpedances[impi:dns]阻抗.Thevalue,A,isknownastheopenloop(withoutfeedback)gainoftheoperationalamplifier.

正如在图6中所示,运算放大器可以表示为一个理想电压源,其值取决于对输入电压的两端出现的反相和非反相输入端加上有限的输入和输出阻抗的影响。值,A,是被称为在运算放大器的开环增益(没有反馈)。

Thesimplifiedmodelofthedifferentialoutputoperationalamplifier(figure7)isanaccurate[kjurit]approximation[prksmen]近似值onlyunderspecialconditionsoffeedback(see“BalancedAmplifier”laterinthishandbook).Figure6representsthemodelofthedifferentialoutputtypewhenitisusedasasingleendedoutputdevice;theinvertingoutputsimplybeingignored.

简化模型的差分输出运算放大器(图7)是一个准确近似,仅在特殊条件下的反馈(见“平衡放大器”,在本手册后面)。图6表示的差分输出的模型类型时,它被用作一个单端输出的移动设备简单地被忽略的反相输出。

TheIdealOperationalAmplifier理想运算放大器

Inordertointroduceoperationalamplifiercircuitry,wewilluseanidealmodeloftheoperationalamplifiertosimplifythemathematics[mθimtiks]involvedinderivinggainexpressions,etc.,forthecircuitspresented.Withthisunderstandingasabasis,itwillbeconvenienttodescribethepropertiesoftherealdevicesthemselvesinlatersections,andfinallytoinvestigatecircuitsutilizingpracticaloperationalamplifiers.为了介绍运算放大器电路中,我们将使用一个理想的模型简化中获得的电路增益表达式等,所涉及的数学运算放大器的。有了这样的认识,以此为基础,可以方便的真实设备本身在后面的章节中描述的属性,最后调查利用实际的运算放大器电路。

Tobeginthepresentationofoperationalamplifiercircuitry[s:kitri],then,itisnecessaryfirstofalltodefinethepropertiesofamythical“perfect”operationalamplifier.Themodelofanidealoperationalamplifierisshowninfigure9.

首先介绍运算放大器电路,那么,它是必要的,首先要定义一个神话般的“完美”的运算放大器的性能。理想的运算放大器的模型是在图9中所示。

DefiningtheIdealOperationalAmplifier

=Gain:Theprimaryfunctionofanamplifieristoamplify,sothemoregainthebetter.Itcanalwaysbereducedwithexternalcircuitry,soweassumegaintobeinfinite

[infinit]无限.

增益:放大器的主要功能是放大的,所以更多的获得更好。它总是可以减少与外部电路,所以我们假设增益是无限

=InputImpedance:Inputimpedanceisassumedtobeinfinite.Thisissothedrivingsourcewon’tbeaffectedbypowerbeingdrawnbytheidealoperationalamplifier.输入阻抗:输入阻抗被认为是无限的。这是这样的驱动源将不会受到影响被绘制了理想的运算放大器的功率。

=OutputImpedance:Theoutputimpedanceoftheidealoperationalamplifierisassumedtobezero.Itthencansupplyasmuchcurrentasnecessarytotheloadbeingdriven.

输出阻抗:理想的运算放大器的输出阻抗被假定为零。然后,它可以提供尽可能多的电流所必需的被驱动的负载。

=ResponseTime:Theoutputmustoccuratthesametimeastheinvertinginputsotheresponsetimeisassumedtobezero.Phaseshiftwillbe180.FrequencyresponsewillbeflatandbandwidthinfinitebecauseACwillbesimplyarapidlyvaryingDCleveltotheidealamplifier.

=Offset:Theamplifieroutputwillbezerowhenazerosignalappearsbetweentheinvertingandnon-invertinginputs.

偏移量:当一个零信号之间出现的反相和非反相输入端,放大器的输出将为零。

CIRCUITSANDANALYSESUSINGTHEIDEALOPERATIONALAMPLIFIER用理想运算放大器的电路及分析

TheDesirabilityofFeedback是可取的反馈

Considertheopenloopamplifierusedinthecircuitoffigure10.Notethatnocurrentflowsfromthesourceintotheinvertinginput-thesummingpointrestraintderivedintheprevioussection-hence,thereisnovoltagedropacrossRSandESappearsacrosstheamplifierinput.WhenESiszero,theoutputiszero.IfEStakesonanynon-zerovalue,theoutputvoltageincreasestosaturation[stren]饱和,andtheamplifieractsasaswitch.

考虑图10的电路中使用的开环放大器。请注意,从源代码编译成的反相输入端-来自上一节中的求和点约束-因此没有电流流过,有没有RS两端的电压降和ES出现整个放大器的输入。当ES是零,其输出为零。如果ES承担任何非零的值,输出电压增大到饱和,该放大器作为一个开关。

Theopenloopamplifierisnotpractical-onceanopampispushedtosaturation,itsbehaviorisunpredictable.Recoverytimefromsaturationisnotspecifiedforopamps(exceptvoltagelimitingtypes).Itmaynotrecoveratall;theoutputmaylatchup.Theoutputstructureofsomeopamps,particularlyrail-to-railmodels,maydrawalotofcurrentastheoutputstageattemptstodrivetooneortheotherrail.Formoredetailsonopampsinopenloopoperation,consultreference1.

TwoImportantFeedbackCircuits

feet,thecarriersoflife

goodmorning,ladiesandgentlemen.

iwouldliketotellyouaboutanunusualassignment.iwassurprisedandamusedwhenourteachertoldusourhomeworkwastowashourfeetcarefully.

yeah,washingthefeetissuchacommondailyactivitythati’veneverpaidmuchattentiontoit.myfeethadbeencooperatingandhelpingeachother,nearlyalwaysmanagingtogetwashed,whileiwasenjoyingmyreadings.butthatnight,whileigentlytouchedmyfeetinthehotwater,irealizedhowniceandcozybathingmyfeetcouldbe.

deepinmymind,thehandsalwaysseemedsuperiortothefeet.peopleuseallsortsofthingsfromsoaptomoisturecreamtoprotecttheirhands.thefeetbecome,kindof,neglected,sincethefeetspendalldaylongwiththegroundanddirt,andquiteinevitably,getreallysmelly.

asislowlysoapedandrinsedmyfeet,iwasbeginningto

understandwhymyteacherlaunchedsuchamission.shewantedustorealizethatthefeetweremorehelpfulthanwehadeverimagined.

surely,thehandsareimportant.howeverit’sthefeetthatcarryyourwholebodyweight,andeverythingaboutyourlife.

thefeetcarryyou,aswellasyourhopesanddreams,andwalksteadilyuponthemostsolidground,movingforwardstepbystep,

uponmountainsanddownvalleys,overthesmoothaswellastherough,throughthebitternessaswellasthejoy.

asiwaswashingmyfeet,iletmymindwander.ifeltasifiwasonavastdesert.lookingaround,isawmillionsoffootprints,largeandsmall,deepandshallow,beingthemarksofexistence,andthetracesoflife.andthereiwas,usingmyownfeet,makingmyownpath,towardstheoasisoflife……

thankyou.

脚,生命的载体

女士们,先生们,上午好!

我想告诉大家一份不寻常的家庭作业,老师布置我们当晚回家认真给自己洗一遍脚,听到后,我感到惊奇而有趣。

是啊,脚,我每晚必洗,但从未重视过。洗脚时,我津津有味地看着书,任双脚摩挲,互帮互助。但今晚,当我的双手触摸到自己的双脚时,是多么的舒服、惬意啊!

心中,总是觉得手比脚高贵,人们用香皂洗手,并抹上护手霜,百般呵护;而脚踩在地上,即使有鞋袜,也总被认为是与灰土打交道的粗笨一族,并有不可避免的异味,脚,似乎成了身体中被忽视的部分。

我仔细地洗着脚,渐渐地,我明白了老师的用意:她布置这个特殊的任务,是为了让我们认识到脚,其实比我们想象的更伟大。

无可争议,手固然重要。可脚却承担着你生命的全部重量。

脚,负着你,你沉甸甸的`希望和梦想,踩着踏实的大地,一步一步地前进,走上了高山也走下了峡谷,走过了平坦也走过了崎岖,走过了苦难也走过了幸福。

我在洗脚,手脚依偎,恍惚间,我仿佛置身于广袤的大漠中。环视四周,一串串大大小小深深浅浅的脚印,这是存在的证明,生命的印迹。而我用自己的双脚,开辟着自己的道路,向生命的绿洲前进……

谢谢!

Goodmorningeveryone,Today,Iwouldliketotalkaboutyouth,aperiodofourlifethatweoftentakeforgranted.Youthisatimewhenwearefilledwithboundlessenergyandpossibilities,anagewhenwecandreambigandworkhardtomakethosedreamscometrue.Asteenagers,wemayfeelthatouryouthiseternal,andthatwehaveallthetimeintheworldtochaseourgoals.Butthetruthis,ouryouthisfleeting,andit’suptoustomakethemostofit.

Duringourteenageyears,wearepresentedwithcountlessopportunitiestolearn,grow,andachieve.Whetherit’sthrougheducation,sports,orextracurricularactivities,wehavethechancetodevelopourskills,discoverourpassions,andbuildasolidfoundationforourfuture.However,wemustalsobeawarethatourdecisionsandactionsduringouryouthcanhavelastingconsequences.Therefore,weshouldmakewisechoices,cultivatehealthyhabits,andsurroundourselveswithpositiveinfluences.

Moreover,youthisnotjustatimeforself-improvement,butalsoatimeforcontribution.Asyoungpeople,wearecapableofmakingadifferenceintheworld,nomatterhowsmallorbigourcontributionsmaybe.Byvolunteering,advocatingforimportantcauses,orsimplybeingagoodfriendtothoseinneed,wecanpositivelyimpactthelivesofothersandcreateabetterfutureforourselvesandthosearoundus.

Inconclusion,youthisapreciousgiftthatweshouldcherishandmakethemostof.Letusseizethistimewithenthusiasm,determination,andcompassion.Letusalsorememberthatouryouthwillnotlastforever,andthatthedecisionswemakeandtheactionswetaketodaywillshapethepersonwebecometomorrow.

Thankyou.

在我们的少年时期,我们有无数的机会来学习、成长和实现。通过教育、运动或课外活动,我们有机会发展自己的技能,发现自己的激情,并为自己的未来打下坚实的基础。然而,我们也必须意识到,在我们的`青春期间的决定和行动可能会产生长远的影响。因此,我们应该做出明智的选择,培养健康的习惯,并周围自己正面积极的影响。

此外,青春不仅是自我提高的时期,也是贡献的时期。作为年轻人,我们能够在世界上产生影响,无论我们的贡献是多小或多大。通过志愿服务、倡导重要事业或简单地成为那些需要帮助的人的好朋友,我们可以对他人的生活产生积极的影响,为我们自己和身边的人创造更美好的未来。

总之,青春是一份珍贵的礼物,我们应该珍惜并充分利用。让我们以热情、决心和同情心抓住这个时期。我们也要记住,我们的青春不会永远存在,我们今天所做出的决定和行动将塑造我们明天的人生。

谢谢。

dearstudents:

ourwayoflifeisalwayssunny,blueskies,whichintheendthemostdazzlingrayofsunlightitwassaidtobeexcellentacademicperformance,itwassaidtobegiventohelpothers....andithinkthatourwayoflifeofthemostbrilliantsunshineshouldbereportedtobelongtothetemplemap,helpustogrowthankstoeveryone.

yes,theinstituteofthanksgivingisafeeling,theinstituteofthanksgiving,butalsoacharacter.asteachersandourstudents,themostimportantgratitudeisaschool.schoolstogiveusabiggrowthstageoflife:brightandspaciousclassrooms,newdesksandchairs,air-conditionedandwell-being,aswellasmulti-mediafacilities,hasprovideduswithanattractivelearningenvironment.readonebookbrightandcleanrooms,providesuswithknowledgeofthemarinetour;flatbeautifulbigplayground,provideduswithagoodplacefortheexercise,andpotteryroom,computerroom,danceroom,multi-purposehall,andsoon,noschoolisnotoutofdevotiontoourselflesslove!

however,inthesebeautifulplaces,oftenwithsomenotesofdiscord.readbooksinoneroom,somestudentsreadthebook,abandonment,idonotknowtheoriginalrelease,thereismoretear,usingthephenomenonofthebook;whentheredandgreenandwhiteartificialbigplaygroundtoopenitselflessembrace,andsomeofthescenesofdiscordhurtoureyes:awiderangeofconfetti,colorfultangzhi,andscatteredinallcornersoftheshellseeds,chewinggum,etc.thelistgoesonofthese!

students,pleaseputyourhandonhischestaskourselves:"idoathanksgivingschoolstudents,letusnowworktogether,withtheirgoodhealthhabitstoschoolthanksgiving,thanksgiving,sothattheflowersoncampusandopenmorebeautiful.

亲爱的同学们:

我们的人生之路总是阳光明媚,晴空万里,到底哪一缕阳光最耀眼?有人说是优异的学习成绩,有人说是给予别人帮助……而我认为在我们的人生路上最灿烂的阳光应该属于知恩图报,感谢帮助我们成长的每一个人。

是的,学会感恩,是一种情怀,学会感恩,更是一种情操.作为教师和学生的我们,最要感恩的就是学校了。学校给我们了一个人生成长的大舞台:宽敞明亮的教室,崭新的桌椅,冷暖空调、以及多媒体设施,为我们提供了一个优美的学习环境。窗明几净的图书阅览一体室,为我们提供了畅游知识的海洋;平坦美丽的`大操场,为我们提供了锻炼身体的好去处,还有陶艺室,电脑室、舞蹈室、多功能报告厅等等,无不是学校对我们奉献出的无私的爱!

可是,在这些美丽的地方,却常常有着一些不和谐的音符。在图书阅览一体室,有的同学看完书后,乱扔乱放,不知道放回原处,更有甚者还有撕书、拿书的现象;当红绿相间的人工大操场向我们敞开它无私的怀抱时,又有一些不和谐的景象刺痛了我们的眼睛:各种各样的纸屑,五颜六色的糖纸,还有散落在各个角落的瓜子壳、口香糖等等这些举不胜举!同学们,请你把手放在自己的胸口扪心自问:“我感恩学校了吗?”

同学们,就让我们共同努力吧,用自己良好的卫生习惯来感恩学校,让感恩的花儿在校园内开放的更加美丽。

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1.英语演讲稿2分钟带翻译(共10篇).doc英语演讲稿2分钟带翻译(共10篇) 篇一:2分钟励志英语演讲稿 2分钟励志英语演讲稿 演讲稿一:2分钟励志英语演讲稿 ladies and gentlemen , good afternoon! i#39;m very glad to stand here and give you a short speech. today my topic is quot;youthquot;. i hope you will like it , and found thehttps://m.book118.com/html/2018/0405/160201418.shtm