名词
中文翻译：降雨量
同义词：
['precipitation', 'rain', 'downpour']
例句：
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1. The rainfall has been heavy thisyear.
今年的降雨量很大。
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2. Therainforest is home tomany rare species of plants andanimals.
雨林是许多稀有植物和动物的家园。
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3. The flood caused bythe heavy rainfall was a major disaster.
由于大雨造成的洪水是一场重大灾难。