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读绘本Millionsandmillionsofyearsago,theearthdidnotlookthewayitdoesnow.Strange-lookingplantsgrewinswamps.Reptileswithwingsflewintheair.亿万年前地球并不是现在这样那时沼泽中长满奇怪的植物长着翅膀的爬行动物在空中飞翔Everywhereonlandweredinosaurs,dinosaurs,...

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双语阅读TheU.S.coversavastarrayofecosystems,fromAlaska’sArctictundratoFlorida’stropicalswamps,withprairies,snow-cappedpeaksanddesertsinbetween.Liketherestoftheplanet,humansareputtingthoseecosystemsunderenormousstrainasweconvertlandtoagricultureand...

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includingthoseofearlyhumans.Ancientswampswereparticularlyplentifulwithprolificgrowthsofvegetation,whichfossilizedinabundance.Manyanimalsbecametrappedinbogsovergrownbyvegetation.Theenvironmentoftheswampskeptbacterial...

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mangroves(红树林)thatcreateswamps(沼泽)andtraditionallyformedbarrierstoseawaterhavebeencutdown.IntheMediterranean,aseriesofdroughtshavecaused

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Itisestimatedthateachyearmorethan10mhectares(公顷)ofagriculturallandarelostbecausesaltgetsintothesoilandstunts(妨碍生长)plants.Theproblemiscausedbyseveralfactors.Inthetropics,mangroves(红树林)thatcreateswamps(沼泽)andtraditionallyformedbarrierstosea...