资料来源 : pyDict

逆风航行,纵帆的前缘,船首弯曲部将船首朝上风驶出上风

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Luff \Luff\, n. [OE. lof, prob. a sort of timber by which the
   course of a ship was directed, perh. a sort of paddle; cf. D.
   loef luff, loeven to luff. The word is perh. akin to E.
   glove. Cf. {Aloof}.] (Naut.)
   (a) The side of a ship toward the wind.
   (b) The act of sailing a ship close to the wind.
   (c) The roundest part of a ship's bow.
   (d) The forward or weather leech of a sail, especially of the
       jib, spanker, and other fore-and-aft sails.

   {Luff tackle}, a purchase composed of a double and single
      block and fall, used for various purposes. --Totten.

   {Luff upon luff}, a luff tackle attached to the fall of
      another luff tackle. --R. H. Dana, Jr.

Luff \Luff\, v. i. [imp. & p. p. {Luffed}; p. pr. & vb. n.
   {Luffing}.] (Naut.)
   To turn the head of a vessel toward the wind; to sail nearer
   the wind; to turn the tiller so as to make the vessel sail
   nearer the wind.

   {To luff round}, or {To luff alee}, to make the extreme of
      this movement, for the purpose of throwing the ship's head
      into the wind.

资料来源 : WordNet®

luff
     n : sailing close to the wind
     v 1: sail close to the wind [syn: {point}]
     2: flap when the wind is blowing equally on both sides; "the
        sails luffed"