wash·board /ˈwɔʃˌbord, ˈwɑʃ, ˌbɔrd/
 洗衣板
 Wash·board n.
 1. A fluted, or ribbed, board on which clothes are rubbed in washing them.
 2. A board running round, and serving as a facing for, the walls of a room, next to the floor; a mopboard.
 3. Naut. A broad, thin plank, fixed along the gunwale of boat to keep the sea from breaking inboard; also, a plank on the sill of a lower deck port, for the same purpose; -- called also wasteboard.
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 washboard
      n 1: device consisting of a corrugated surface to scrub clothes
           on
      2: protective covering consisting of a broad plank along a
         gunwale to keep water from splashing over the side [syn: splashboard]