VOA慢速英语2011.09.05
[audio]http://sound.yywz123.com/tingbbs/voa/voa20110905.mp3[/audio]Some trees can survive a long time without water. Think of trees that grow in the desert. But other trees may need more moisture than they can get from rainfall or from the air -- from, say, coastal or mountain fog.
有些树木在没有水的情况下可以生存很长时间，比如那些生长在沙漠的树。但是其它的树可能除了从降水和空气中获取水分之外，还需要从其它地方获取更多的水分,例如沿海或山上的雾气。
The soil stores moisture during cooler weather. But most of that moisture is gone by the middle or end of the hottest months of the year.
土壤可以在较冷的天气下储存水分。但大多数水分都会在一年中最热的那几个月的中期或末期消耗完。
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They can also turn yellow. Yellowing can be a sign of too much water. But it can also be a warning sign of too little water.
泛黄又可能是水分过剩的迹象，或者是植物太缺水的警报信号。
The Vacaville Tree Foundation is a volunteer community group in California. It has advice for watering newly planted trees and established trees.
Vacaville树木基金会是加州的一个志愿者社区组织，它对新种植并浇灌过水的树和以成长的树有建议。
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