pearl sac

例句：

1. 1. The pearlsac is a small container for storing small items.
   珍珠囊是一个用于存放小物品的小容器。
2. 2. The pearl sac is often used to store jewelry or other valuable items.
   珍珠囊通常用于存放珠宝或其他贵重物品。
3. 3. The pearl sac is a useful tool for organizing and protecting delicate items.
   珍珠囊是一种有用的工具，用于组织和保护易碎的物品。