acrotarsium

例句：

1. 1.The acrotarsium is the main body of the ant, with its head at the front.
   蚁的腹部是主体，头部在前方。
2. 2. The acrotarsium is where the ant's brain is located.
   蚁脑位于腹部。
3. 3. The acrotarsium is also where the ant's digestive system begins.
   蚁的消化系统也从腹部开始。