名词
中文翻译：小圆孔
同义词：
['hole', 'crevice', 'pit']
例句：
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1.The lacune in the wall is a perfect hiding spot.
墙上的小洞是一个完美的藏身之地。
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2. The old book had several lacunes that were difficult to read.
那本旧书有几个难以辨认的小洞。
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3.The lacunes in the stone floor were too small to be seen with the naked eye.
石头地板上的小洞太小，肉眼无法看见。