动词短语
中文翻译：Unknown
同义词：
['sit down', 'fall down', 'lie down']
例句：
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1.She flopped down on the couchand started watching TV.
她突然坐在沙发上开始看电视。
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2. The old man fell down onthe floor when he got up too quickly.
老人突然站起来太快摔倒在地上。
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3. He laydown on the grass to rest after along day's work.
工作了一整天后，他躺在草地上休息。