动词
中文翻译：跌倒
同义词：
['stumble', 'trip', 'fall']
例句：
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1. He stumbled over the threshold and almost fell down.
他绊倒在门槛上，差点摔倒。
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2. The old man tripped on the uneven ground and fell to the ground.
老人因地面不平而摔倒。
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3. The child fell asleep in his chair, exhausted from playing outside.
孩子在椅子上睡着了，因为在外面玩耍已经筋疲力尽了。