central rod

例句：

1. 1. Thecentral rod of the machine is responsible forholding everything together.
   机器的中心杆负责将所有部件连接在一起。
2. 2. The pivot of thetable is the central rod that allows itto rotate.
   桌子的支点是中心杆，它允许桌子旋转。
3. 3. The axisof the clock is the central rod thatruns through the middle of the clock face.
   钟表的轴线是穿过表盘中心的中心杆。