hav·er·sack /ˈhævɚ/
  糧袋,背袋
  Hav·er·sack n.
  1. A bag for oats or oatmeal. [Prov. Eng.]
  2. A bag or case, usually of stout cloth, in which a soldier carries his rations when on a march; -- distinguished from knapsack.
  3. A gunner's case or bag used to carry cartridges from the ammunition chest to the piece in loading.
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  haversack
       n : a bag carried by a strap on your back or shoulder [syn: backpack,
            back pack, knapsack, packsack, rucksack]