preserver
 保護者,保存者,防腐物


 Pre·serv·er n.
 1. One who, or that which, preserves, saves, or defends, from destruction, injury, or decay; esp., one who saves the life or character of another.
 2. One who makes preserves of fruit.
 Game preserver. See under Game.

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 preserver
      n 1: a skilled worker who is employed to restore or refinish
           buildings or antique furniture [syn: refinisher, renovator,
            restorer]
      2: a cook who preserves fruits or meat
      3: someone who keeps safe from harm or danger
      4: rescue equipment consisting of a buoyant belt or jacket to
         keep a person from drowning [syn: life preserver, {flotation
         device]