名词
中文翻译：霜冻空洞
同义词：
['frost cavity', "frost hollow例句：1. The tree's trunk was covered in a layer of frost and had a hollow sound when tapped.（这棵树的树干上覆盖着一层霜，并且敲起来有空洞的声音。）"]
例句：
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1. The tree's trunk was covered in a layer of frost and had a hollow sound when tapped.
这棵树的树干上覆盖着一层霜，并且敲起来有空洞的声音。
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2.The hollow space between the rocks is filled with water.
岩石之间的空洞里充满了水。
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3. The hollow sound echoed through the forest.
空洞中回荡着回声。