| 单词 | cavity | 
| 释义 | cav·i·ty   (kăvĭ-tē) n. pl.   cav·i·ties  1.  A hollow; a hole. 2.  A hollow area within the body: a sinus cavity. 3.  A pitted area in a tooth caused by caries. [French cavité, from Late Latin cavitās, from Latin cavus, hollow; see  keuə- in the Appendix of Indo-European roots.] | 
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