n. 粗帆布背包

[ noun ]
a bag carried by a strap on your back or shoulder
<noun.artifact>

Haversack \Hav"er*sack\ (h[a^]v"[~e]r*s[a^]k), n. [F. havresac,
G. habersack, sack for oats. See 2d {Haver}, and {Sack} a
bag.]
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.