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发表于:2016-11-24
Theearthscalechangeofclimatehasbroughtanewkindofnaturaldisasterandthedevelopedandcomplicatedcitysystemisholdingalatentriskofexpandingthedamageartificially.Alsopeoplehasbe...
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发表于:2016-06-23
Itisundeniablethattheworseningenvironmenthasbecomethebiggestconcernofthepresent-dayworld.Landresourcesaredwindlingbecauseofwater[复习必备|海量免费学习视频资源尽在“学而思...
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发表于:2022-06-21
Nowadaysmoreandmorepeoplerealizeit`snecessaryandimportanttoprotecttheenvironment.Alsotherearesomepeoplewhodon`tpayattentiontohygieneandtheycan`tstoplitteringtherubbishcas...