英文原文
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中文原文
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Some trees can survive a long time without water. |
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有些树木在缺水的情况下也能存活很长时间, |
Think of trees that grow in the desert. |
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例如沙漠中生长的树木。 |
But other trees may need more moisture than they can get from rainfall or from the air from, from say, coastal or mountain fog. |
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但有些树木可能无法从降水和空气中获取充足的水分---沿海或山雾的空气都能提供水分。 |
The soil stores moisture during cooler weather. |
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土壤可以在凉爽天气期间储存水分。 |
But most of that moisture is gone by the middle or end of the hottest months of the year. |
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但其中大部分水分在一年中最热那几个月的中期或后期就会用完。 |
Trees and other plants can look thirsty. |
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树木和其它植物能看出来干渴。 |
Leaves can become droopy and hang downward. |
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叶子会枯萎下垂, |
They can also turn yellow. |
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还会变黄。 |
Yellowing can be a sign of too much water. |
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泛黄可能是水分过剩的迹象, |
But it can also be a warning sign of too little water. |
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但也可能是水分不足的警告迹象。 |