HYPERLINK"http://www.jsustenglish.cn/gongchenshuoshi/%B9%A4%B3%CC%CB%B6%CA%BF%D3%A2%D3%EF%BF%CE/unit3/language.htm"\l"1"\o"保护"PreservingOurPlanetHYPERLINK"http://www.jsustenglish.cn/gongchenshuoshi/%B9%A4%B3%CC%CB%B6%CA%BF%D3%A2%D3%EF%BF%CE/unit3/language.htm"\l"21"[1]HYPERLINK"http://www.jsustenglish.cn/gongchenshuoshi/%B9%A4%B3%CC%CB%B6%CA%BF%D3%A2%D3%EF%BF%CE/unit3/language.htm"\l"2"\o"尽管"Despitedecadesofscientificresearch,nooneyetknowshowmuchdamagehumanactivityisdoingtotheenvironment.Humansarethoughttoberesponsibleforalargenumberofenvironmentalproblems,HYPERLINK"http://www.jsustenglish.cn/gongchenshuoshi/%B9%A4%B3%CC%CB%B6%CA%BF%D3%A2%D3%EF%BF%CE/unit3/language.htm"\l"3"\o"(范围)从....到"rangingfromglobalwarmingtoozonedepletion.WhatisnotHYPERLINK"http://www.jsustenglish.cn/gongchenshuoshi/%B9%A4%B3%CC%CB%B6%CA%BF%D3%A2%D3%EF%BF%CE/unit3/language.htm"\l"4"\o"怀疑，疑问"indoubt,however,isthedevastatingHYPERLINK"http://www.jsustenglish.cn/gongchenshuoshi/%B9%A4%B3%CC%CB%B6%CA%BF%D3%A2%D3%EF%BF%CE/unit3/language.htm"\l"5"effecthumansarehavingontheanimalandplantlifeoftheplanet.HYPERLINK"http://www.jsustenglish.cn/gongchenshuoshi/%B9%A4%B3%CC%CB%B6%CA%BF%D3%A2%D3%EF%BF%CE/unit3/language.htm"\l"21"[Chinese][1]尽管科学研究进行了几十年，但仍然没有人知道人类活动对环境的破坏究竟有多大。人类被认为应读为一系列环境问题负责，从全球温度上升到臭氧大大减少。然而有一点是毫无疑问的，即人类正对地球上的动、植物的生活产生极大的破坏作用，[2]Currently,anestimated50,000HYPERLINK"http://www.jsustenglish.cn/gongchenshuoshi/%B9%A4%B3%CC%CB%B6%CA%BF%D3%A2%D3%EF%BF%CE/unit3/language.htm"\o"物种"speciesbecomeHYPERLINK"http://www.jsustenglish.cn/gongchenshuoshi/%B9%A4%B3%CC%CB%B6%CA%BF%D3%A2%D3%EF%BF%CE/unit3/Chinese.htm"\o"灭绝"extincteveryyear.Ifthiscarrieson,theHYPERLINK"http://www.jsustenglish.cn/gongchenshuoshi/%B9%A4%B3%CC%CB%B6%CA%BF%D3%A2%D3%EF%BF%CE/unit3/language.htm"\l"5"\o"对。。。有影响"impactonalllivingcreaturesislikelytobeHYPERLINK"http://www.iciba.com/search?s=+profound"\o"深远，深刻"\t"_blank"profound,saysDrNickMiddleton,ageographeratOxfordUniversity."Allspeciesdependinsom