动词
中文翻译：跌倒
同义词：
['fall', 'drop', 'tumble', 'collapse']
例句：
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1. The tree fell over when the wind blew.
风吹来时，树倒下了。
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2. The children fell asleep as soon as they arrived home.
孩子们一到家就睡着了。
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3. The old man fell ill and had to stay in bed for a week.
老人生病了，卧床一周。