yank /ˈjæŋk/
  (vt.)(vi.)猛拉
  Yank n.  A jerk or twitch.  [Colloq. U. S.]
  Yank, v. t. [imp. & p. p. Yanked p. pr. & vb. n. Yanking.] To twitch; to jerk.  [Colloq. U. S.]
  Yank, n. An abbreviation of Yankee.  [Slang]
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  Yank
       n 1: an American who lives in the North (especially during the
            American Civil War) [syn: Yankee, Northerner]
       2: an American who lives in New England [syn: New Englander,
          Yankee]
       3: an American [syn: Yankee, Yankee-Doodle]
       v : pull, or move with a sudden movement; "He turned the handle
           and jerked the door open" [syn: jerk]