active wrist rotation unit的用法和样例：
- New CNC 99T main gear for 3D ratio (8.25:1:4.77) High torque auto rotation unit also standard.
- The foot operated wrist exerciser was used for the elderly to do combined wrist and ankle exercises, which works through kicking the paddle to make wrist rotating.
- His odds are very poor after he sprained his wrist.
- She wears a ring round her wrist.
- The orient has been playing an active role in the world economy.