Yahoo香港字典 搜尋

  1. plumb bob

    • IPA[ˈpləm ˌbäb]

    美式

    • n.
      a bob of lead or other heavy material forming the weight of a plumb line.
    • noun: plumb bob, plural noun: plumb bobs

    • 更多解釋
    • n.
      a bob of lead or other heavy material forming the weight of a plumb line.

    Oxford Dictionary