ledge /ˈlɛʤ/
 突出之部分,暗礁,礦層
 Ledge n.  [Formerly written lidge.]
 1. A shelf on which articles may be laid; also, that which resembles such a shelf in form or use, as a projecting ridge or part, or a molding or edge in joinery.
 2. A shelf, ridge, or reef, of rocks.
 3. A layer or stratum.
    The lowest ledge or row should be of stone.   --Sir H. Wotton.
 4. Mining A lode; a limited mass of rock bearing valuable mineral.
 5. Shipbuilding A piece of timber to support the deck, placed athwartship between beams.
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 ledge
      n : a projecting ridge on a mountain or submerged under water
          [syn: shelf]