sling stay bolt and washer

例句：

1. 1. The hunter slung his bow over his shoulder.
   猎人把弓挂在肩上。
2. 2. The soldiers slung their rifles over their shoulders.
   士兵们把步枪挂在肩上。
3. 3. The boy slung the ball onto the ground.
   男孩把球扔到地上。