金属铸孔的英文：
cavity

cavity是什么意思：
n. 腔；洞
  • The hole in the tooth is cavity.
    牙上的洞叫做蛀牙。
  • The peritoneal cavity is a closed sac.
    腹膜腔是一个封闭的囊腔。
  • To insert a pack into a body cavity or wound.
    塞裹布把裹布塞入人体体腔或伤口
  • There's a cavity in the boy's tooth.
    这个男孩的牙上有一个洞。
  • The dentist carefully located the filling in the cavity
    牙医小心地把填塞的东西放入牙洞里。

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