oncemandidnothavetothinkabouttheprotectionofhisenvironment.therewerefewpeopleontheearth,andnaturalresourcesseemedtobeunlimited.
todaythingsaredifferent.theworldhasbecometoocrowded.weareusingupournaturalresources,andpollutingourenvironmentwithdangerouschemicals.ifwecontinuetodothis,humanlifeonearthwillnotsurvive.
werealizethatiftoomanyfisharetakenfromthesea,therewillsoonbenoneleft.yet,withmodernfishingmethods,moreandmorefishareknowthatiftoomanytreesarecutdown,forestswilldisappear.yet,wecontinuetousepowerfulmachinestocutdownmoreandmoretrees.weseethatifriversarepollutedwithwasteproducts,wewilldie.yet,wasteproductsare
stillputintorivers.
weknowthatifthepopulationcontinuestoriseatthepresentrate,inafewyears,therewon＇tbeenoughcanwedotosolvetheseproblems
ifweeatmorevegetablesandlessmeat,therewillbemorefoodavailable.landforcropsfeedsfivetimesmorepeoplethanlandwhereanimalsarekept.
ournaturalresourceswilllastlongerifwelearntorecyciethem.
theworldpopulationwillnotrisesoquicklyifpeopleusemodernmethodsofbirthcontrol.
finally,ifweeducatepeopletothinkabouttheproblemsweshallhaveabetterandcleanerplanetinthefuture.
nowadays,itisgenerallyacknowledgedthattheautomobilesmakeourlifearguethattheyplayanessentialroleinourmodernlifeandwecannotlivewellwithoutdrivetheircarstogotoworkwhichsavesmoretimeandenergy.
butsomeotherpeoplebelievethatagreatmanyofproblemscanbebroughtbytheofall,muchtailgasreleasedbycarsharmpollutesthefreshairgravely.secondly,toomanycarsresulttheroadsinblocked.finally,fastdrivingmakespeoplecrazy,whichcanaccountforsomanytrafficaccidents.
但是另一些人认为汽车也带来了很多问题。首先，汽车尾气的释放严重危害了新鲜的空气。其次，汽车过多导致道路堵塞。最后，开快车让人疯狂，这可以解释很多交通事故发生的原因。
asfarasiconcerned,itisnodoubtthatvehiclescontributetooureconomicdevelopmentexceedingly.butifweoveruseit,manyundesirableconsequencescanbesurelycaused,whichcontainshighwayaccidents,airpollutionandsoon.soatthismoment,wemusttakemeasurestoavoidthesehappen.
就我而言，我认为汽车有助于我们的经济发展是毫无疑问的。但如果我们过度使用汽车，会引起很多不良的后果，包括公路交通事故，空气污染等。所以在这一时刻，我们必须采取措施防止这些事件的发生。
americansliketogooutbycar.althoughmoreandmorechineseowncars,mostchinesestillliketoridebicycles,thisisdeterminedbyalotoffactors.
asweallknow,thebikeadvancesslowlybymanpower,butitcanbeplacedwhereveritisconvenienthowever,asforthecar,althoughitcanrunfastbyengine,itmustbeparkedatparkingplaces.
mostamericansliveinthesuburbwhichisfarfromurbanareasandtheirworkingplaces.sotheyneedcarstogoshoppingandgotowork.andtheyalsoliketravelingfar.thusacarbringsthemgreatconvenience.onthecontrary,mostchineseliveneartheirworkingareasandmarkets.theydon'tneedacartogotoworkorgoshopping.
iwouldliketorideabike,becauseitcostslittleanditiseasytouseandwon'tcausepollution.
美国人喜欢乘汽车外出。尽管越采越多的中国人拥有了汽车，但大部分中国人仍喜欢骑自行车，这是由很多因素决定的.。
众所周知，自行车靠人力，行进慢，但可以在方便的地方停放。然而对于汽车来说，虽然它依靠发动机行进很快，但它必须停在停车场。
多数美国人生活在郊区，远离市区及工作地点，所以他们需要汽车来购物、上班，并且他们也喜欢驾车远行。因此汽车给他们提供很大方便。相反，多数中国人居住在工作地点和市场附近，他们不需要开车去上班或购物。
我喜欢骑自行车外出，因为它花费少而且容易使用。最重要的是自行车不会引起污染。
abusoracan？
“goodheavens!”ialwayssighwithreliefwhenigetoffbusno.65.
therearemanystoriesofsadnessandsorrowsaboutbusno.65,whichitakeeverydayonmywaytoschool.
itisusualformetowaitforovertenminutesatthebusstopwithoutseeingabuscomingduringtherushhour.thiscausesmoreandmorepeopletogather.amongthemarethoserushingtowork,peasantsgoingtotherailwaystationwithheavyluggageandstudentsgoingtoschoolwithschoolbagsontheirshoulders.
whenfinallyabusarrives,peoplewillforcetheirwayintoitwhenitisstillmoving.thedoorsopen,mentryhardtobethefirsttogeton.theydon＇tevenwaitforthepassengersonthebustogetoff!
inawhile,thebusisfilledagain.itissofullthattheconductorhasdifficultyclosingthedoors.afewpeopleareforcedtostepoff.evenso,thedoorsstillcannotclosefast.sosomewarm-heartedmenhavetopushhardonthebacksofthefewwhoareonlyhalfinandkickthedoorsclose.
sometimesitisimpossibleforyoutobuyaticket,forifyoutrytoturnarounditwillcausecomplaintsfromothers.ioftenfeelasifiweresotightlytiedthatiwerealmostoutofbreath.complaints,cries,angrycurses①andquarrelssoonfillmyears.
“i＇malmostbreathless!”anoldladymurmurs.
“myhandbag!whereisit”shoutssomeone.
“moveabit,can＇tyouyou＇resteppingonmytoe!”anothercriesangrily.
“whyonearthdoyoupushyourelbow②againstmystomach”stillanotherprotests③.
“thosevillagers!throwthemout!seehowmanybigbagstheycarrywiththem!”manyshoutinonevoice.
babiesletoutscreamsoffrightsandsufferings.
althoughiamsouseddoquarrelsthatiamalmostnotcaringaboutthem,yetiverymuchwishicouldturnmyearsawayfromthesenoises.ican＇thelpwonderingwhetheriamoneofthesardines④packedtightlyinacan.
whenatlastiampushedonthebusbythegateofmyschool,iamoftentroubledbysuchaquestion,“whenwillallmysufferingsoftakingbusno.65end”