Yahoo香港字典 搜尋

登入
  1. 更多

搜尋結果

  1. Oxford American Dictionary

    portal system

    • IPA[ˈpôrdl ˈsistim]
    • n.
      the system of blood vessels consisting of the portal vein with its tributaries and branches.；any system of blood vessels which has a capillary network at each end.

    • noun: portal system, plural noun: portal systems