支点

例句：

1. 1. Thepivot of the machine is located at thebottom.
   机器的支点位于底部。
2. 2. Theaxis of the clock is perfectly aligned.
   钟表的轴完美对齐。
3. 3. Thepivot of the plank is where theweight will be supported.
   木板的支点是支撑重量的地方。