名词
中文翻译：洞
同义词：
['cave', 'crevice', 'pit', 'gap', 'niche', 'opening']
例句：
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1. The hole in the wall is a perfect hiding spot.
墙上的洞是一个完美的藏身之处。
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2. The hole in the ground was filled with water.
地里的洞被水填满了。
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3. He carefully placed the key into the lock and turned it to open the door.
他小心翼翼地把钥匙插入锁中并转动它来打开门。