actiones[法] 诉讼actionn.行为；活动；措施；效用；交战；情节；事件；姿态；起诉；机能action electrode作用电极actional passive动作被动；动作被动语态action checklist复核备忘action objective行为目标action condition行为要件action of giving缓冲动作Action semantics行为语义Action Deviation动作偏差action stability动作稳定性action reasoning动作推理

1. Click on the center dot to rotate the hand around the action line.
   点击中心圆点，沿着作用线旋转手臂。
2. There is an exceptional case, three forces with paralleled lines of action, which will be discussed in Chapter 3.
   三个力的作用线相互平行的例外情况，我们将在第三章讨论。