Yahoo奇摩字典 網頁搜尋

  1. filter bed

    • IPA[ˈfiltər ˌbed]
    • n.
      a tank or pond containing a layer of sand or gravel, used for filtering large quantities of liquid.
    • noun: filter bed, plural noun: filter beds

    • 更多解釋
    • n.
      a tank or pond containing a layer of sand or gravel, used for filtering large quantities of liquid.

    Oxford Dictionary