bottleholder
  隨伴人
  Bot·tle·hold·er n.
  1. One who attends a pugilist in a prize fight; -- so called from the bottle of water of which he has charge.
  2. One who assists or supports another in a contest; an abettor; a backer. [Colloq.]
     Lord Palmerston considered himself the bottleholder of oppressed states.   --The London Times.
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