a dexterous mechanic的用法和样例：
- The game was won by a dexterous turn of the wrist.
- A structural devise of a dexterous hand with multi-fingers driven by pneumatic artifical muscle is introduced.
- Using the 3D graphics software OpenInventor, the sysyem simulates the ?gesture? of dexterous mechanical gripper and collision detection.
- She is a dexterous typist.