stair·case /-ˌkes/
  樓梯,梯子,樓梯部分
  Stair·case n. A flight of stairs with their supporting framework, casing, balusters, etc.
     To make a complete staircase is a curious piece of architecture.   --Sir H. Wotton.
  Staircase shell. Zool. (a) Any scalaria, or wentletrap. (b) Any species of Solarium, or perspective shell.
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  staircase
       n : a way of access consisting of a set of steps [syn: stairway,
            stairs, steps]