动词
中文翻译：敲门
同义词：
['knock', 'tap', 'rap', 'tap on the door']
例句：
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1.She knocked at the door and was let in by the maid.
她敲门，被女仆让进了房间。
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2. The thief knocked at the door and asked for a light.
这个贼敲门要灯。
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3. He knocked at the door to ask if anyone was home.
他敲门问家里有人吗。