dart sac

例句：

1. 1. The hunter carefully placed the dart sac into the animal's mouth.
   猎人小心翼翼地将弹射囊放入动物口中。
2. 2. The dart sac was filled with a small arrow and attached to the end of the bow.
   弹射囊里装满了一小支箭，并系在弓的末端。
3. 3.During the hunt, the hunter used the dart sac to surprise his prey.
   狩猎时，猎人使用弹射囊来惊吓猎物。