名词
中文翻译：小洞穴
同义词：
['cave', 'burrow', 'hole']
例句：
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1. The nook in the forest was perfect for hiding.
森林里的这个小洞非常适合藏身。
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2. The cave is too dark to see anything.
这个洞穴太暗了，什么都看不见。
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3. She found a small hole in the wall and crawled through it.
她发现墙上有一个小洞，就爬了过去。