名词
中文翻译：洞
同义词：
['hole', 'gap', 'crevice', 'pit']
例句：
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1. The hole in the wall is big enough for a person to crawl through.
墙上的洞足够一个人爬过去。
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2. The gap between the two countries has widened over the years.
两国之间的差距多年来已经扩大了。
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3. The pit was filled with water after the flood.
洪水过后，这个坑被水填满了。