问题标题：
英语翻译Therearesomeplacesintheworldwheregreatcitiesoncestood.Thereweregardens,treesandgrass.Butnowthesecitieshavegoneandtheplacesarelikedeserts.Scientistsbegantostudythislandtofindoutwhathadhappened.Manyoft
问题描述：
英语翻译
Therearesomeplacesintheworldwheregreatcitiesoncestood.Thereweregardens,treesandgrass.Butnowthesecitieshavegoneandtheplacesarelikedeserts.Scientistsbegantostudythislandtofindoutwhathadhappened.Manyofthembelievedthelanddiedwhenthetreeswerecutdown.
Treeshelpotherplantsgrowandhelpholdthesoilinplace.Theykeepthesoilfromblowingaway.Theleavesoftreesonthegroundkeeprainwaterfromrunningoff.Treesnearfarmsprotectgrowingplantsfromstrongwinds.
OncetherewerehundredsoffarmsintheSouthwesternUnitedStates.Thenthefarmsturnedintofieldsofdrydust(尘土).Treesmighthavesavedthesefarms.ButfewtreesgrowinthedrySouthwestnow.
Nowwetrytosavetrees.Inmanyplaces,whenatreeiscutdown,anewtreeisplantedinitsplace.Wedonotwantthelandtodie.
柳俊中回答：
这个世界上有很多地方曾经矗立着伟大的城市,有着花园、树木和草丛.但是现在这些城市都消失了,这些地方如今变成了沙漠.科学家开始研究这些土地希望可以发现在这里发生过什么事情.大部分科学家认为土地是在树木被砍伐...
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