Extreme rainfall events will also become more frequent and intense in a warmer climate, owing to another simple fact of physics: warm air can hold more moisture.

极端降雨事件在变暖的气候中越来越频繁，越来越强烈，其原因是另一个简单的物理事实：暖空气可以容纳更多的水分。

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In addition to extreme warmth, the rainforests also need lots of moisture.

除了要非常温暖之外，雨林还需要大量的水分。

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Do not expose the balance to extreme moisture over long periods.

请您不要将天平长期置于湿度较大的环境里。

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That does not sound like much but it does mean that extreme rain storms may bring more rain than before - with more moisture in the air, what goes up must come down, and the odds are worse.

BBC: Why, oh why, does it keep raining?