名词
中文翻译：结孔
同义词：
['hole', 'gap', 'crevice', 'crack']
例句：
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1.The knot-hole in the wall is where the light comes through.
墙上的结孔是光线进来的地方。
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2. The old house has several knot-holes that need repairing.
这所旧房子有几个需要修补的结孔。
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3.The car was found with a knot-hole in the engine compartment.
这辆车被发现引擎舱有一个结孔。