shaft of chelicera

例句：

1. 1. The car's engine is located in the center of the vehicle.
   汽车的发动机位于车辆中心。
2. 2. The tree has a tall shaft that reaches the sky.
   这棵树有一根很高的杆子，直通云霄。
3. 3. The machine's shaft rotates slowly as it works.
   这台机器的轴转动得很慢，因为它在工作。