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1. Oxford American Dictionary

   ply

   • IPA[plī]

   美式

   • n.
     a thickness or layer of a folded or laminated material；a strand of yarn or rope

   • noun: ply, plural noun: plies

2. • 釋義

   n.

   名詞

   • 1. a thickness or layer of a folded or laminated material tiles that have a black PVC ply in the lamination
   • ▪ a strand of yarn or rope four-ply yarn
   • ▪ the number of layers or strands of which something is made the yarn can be any ply from two to eight
   • ▪ a reinforcing layer of fabric in a tire a six-ply whitewall tire
   • 2. short for plywood
   • 3. (in game theory) the number of levels at which branching occurs in a tree of possible outcomes, typically corresponding to the number of moves ahead (in chess strictly half-moves ahead) considered by a computer program.
   • ▪ a half-move (i.e. one player's move) in computer chess.