grasping arm

例句：

1. 1. Thepoliceman was seen grabbing the thief's arm.
   警察被看到抓住了小偷的手臂。
2. 2. He reached out and grabbedthe bag from her.
   他伸出手，从她那里抓了那个包。
3. 3. She triedto grab hold of the rope but missed.
   她试图抓住绳子，但没抓住。