0 a metal bar on a door or window that slides across to lock it closed -- (门窗上的)插销,闩
1 a screw-like metal object without a point, used with a nut to fasten things together -- 螺栓
2 a flash of lightning that looks like a white line against the sky -- 闪电,霹雳
3 a length or roll of cloth or wallpaper -- (布或墙纸的)一匹,一卷
4 a type of short arrow shot from a crossbow (= a type of weapon) -- 弩箭;方镞箭