在缺雨的年份，它们的年轮就窄小。

In a dry year, they form narrow ones.

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因为缺雨，这条河正在干涸。

The river is drying up because there is no rain.

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缺雨使农民们深感忧虑。

The lack of rain deeply concerned the farmers.

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缺雨使水库水位降低。

Lack of rain sank the reservoirs.

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缺雨使水库水位降低。

Lack of rain sank the reservoirs.

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