名词
中文翻译：门柱
同义词：
['doorstop', 'doorjamb']
例句：
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1.The old house had a wooden doorpost that was worn out.
这所老房子的门柱已经磨损了。
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2.The doorpost was so rotten that it broke off in my hand.
门柱腐烂得如此严重，以至于从我手中断裂。
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3. The doorpost is what keeps the door from falling off its hinges.
门柱是防止门从铰链处脱落的。