shelf /ˈʃɛlf/
 架子,擱架
 shelf
 現成的; 現有的; 現貨
 shelf
 架子; 層; 格
 shelf
 架
 Shelf n.; pl. Shelves
 1. Arch. A flat tablet or ledge of any material set horizontally at a distance from the floor, to hold objects of use or ornament.
 2. A sand bank in the sea, or a rock, or ledge of rocks, rendering the water shallow, and dangerous to ships.
    On the tawny sands and shelves.   --Milton.
    On the secret shelves with fury cast.   --Dryden.
 3. Mining A stratum lying in a very even manner; a flat, projecting layer of rock.
 4. Naut. A piece of timber running the whole length of a vessel inside the timberheads.
 To lay on the shelf, to lay aside as unnecessary or useless; to dismiss; to discard.
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 shelf
      n 1: a support that consists of a horizontal surface for holding
           objects
      2: a projecting ridge on a mountain or submerged under water
         [syn: ledge]
      [also: shelves (pl)]