形容词
中文翻译：空心的
同义词：
['void', 'hollow', 'empty例句：1. The tree was hollow and could easily be broken.（这棵树是空心的，很容易折断。）2. The hollow space in the wall is where the pipes are hidden.（墙壁中的空腔是管道隐藏的地方。）']
例句：
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1. The tree was hollow and could easily be broken.
这棵树是空心的，很容易折断。
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2. The hollow space in the wall is where the pipes are hidden.
墙壁中的空腔是管道隐藏的地方。
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3.The hollow sound of the bell echoed through the hall.
钟声空洞地在大厅中回荡。