pelrium

例句：

1. 1. The pellum is the part of the crayfish that contains its digestive system.
   小虾的腹部是它消化系统的所在部位。
2. 2.Pellums are a popular seafood dish in many Asian countries.
   小虾在许多亚洲国家是一种受欢迎的海鲜菜肴。
3. 3.The pellums were so small that they could barely fit in my hand.
   小虾太小了，几乎无法放入我的手掌。