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柯林斯高阶英汉双解学习词典释义
  • N-COUNT
    洞;孔;腔
    A cavity is a space or hole in something such as a solid object or a person's body.
  • N-COUNT
    (牙科)龋洞,蛀牙洞
    In dentistry, a cavity is a hole in a tooth, caused by decay.