资源描述:
《新托福综合写作-鸟类数量减少的原因》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、智课网TOEFL备考资料新托福综合写作:鸟类数量减少的原因摘要:小马过河托福频道为大家带来了新托福综合写作:鸟类数量减少的原因,供考生们参考使用,更多托福辅导请继续关注小马过河托福频道!在新托福综合写作中,有的同学语言使用的能力还有一定局限,还要刻意追求句式的复杂化,但这样的后果就是写出来的句子个个都有错,个个都有表达不清。其实用最好的词表达最多的内容才是最厉害的写作方式,本文小马过河为大家整理了一篇新托福综合写作范文,来源于TPO17。阅读材料:Inthepastcentury,thesteady
2、growthofthehumanpopulationandthecorrespondingincreasinginagricultureandpesticideusehavecausedmuchharmtowildlifeintheUnitedStates–birdsinparticular.Unfortunatelyforbirds,thesetrendsarelikelytocontinue,withtheresultthatthenumberofbirdsintheUnitedStateswi
3、llnecessarilydecline.在过去的一个世界,人类数量的增加以及随之而来的农业生产的发展和杀虫剂的增加使得很多美国的野生动物受到了影响,而这种问题在鸟类上表现得更为明显。更加不幸的是,由于人口数量、农业生产和杀虫剂使用的趋势不会改变,美国的鸟类数量将会必然地随之下降。First,ashumanpopulationsandsettlementscontinuetoexpand,birds’naturalhabitatswillcontinuetodisappear.Forests,wet
4、lands,andgrasslandswillgivewaytoevermorehomes,malls,andoffices.Asthetraditionalareassuitableforbirdskeepdecreasing,sowillthesizeofthebirds’populationsthatdependonthosevanishinghabitats.首先,随着人口数量和居住面积的不断扩张,鸟类天然的栖息地持续地减少。森林、湿地和草原都变成的住宅、商场和写字楼。随着那些传统的适宜鸟类
5、栖息的地方持续减少,失去赖以生存栖息地的鸟类,数量自然是减少的。Second,agriculturalactivitiesmustincreasetokeeppacewiththegrowinghumanpopulation.Thegrowthofagriculturewillalsoresultinthefurtherdestructionofbirdhabitatsasmoreandmorewildernessareasareconvertedtoagriculturaluse.Asaresul
6、t,birdpopulationsinruralareaswillcontinuetodecline.Third,ashumansettlementsexpandandagricultureincreases,theuseofchemicalpesticideswillalsoincrease.Pesticidesarepoisonsdesignedtokillagriculturalandhomegardenpests,suchasinsects,butinevitable,pesticidesg
7、etintothewaterandintothefoodchainforbirdswheretheycanharmbirds.Birdsthateatthepoisonedinsectsordrinkcontaminatedwatercandieasaresult,andevenifpesticidesdonotkillbirdsoutright,theycanpreventthemfromreproducingsuccessfully.So,pesticideshavesignificantlyc
8、ontributedtodeclinesinbirdpopulation,andbecausetherewillcontinuetobeaneedtocontrolagriculturalpestsinthefuture,thisdeclinewillcontinue.第三,随着人类居住地的扩展和农业的发展,化学农药的使用也增加了。农药是用来杀死诸如昆虫之类的生长在农田或者菜园的害虫的有毒物质。不可避免的是,这些农药会进入水系和食物链,进而伤害鸟类。鸟类会吃被毒死的昆