loosen grain

例句：

1. 1.She loosened her grip on the rope and let it go.
   她松开了对绳子的握持，让它飘走。
2. 2.The tension in the room had been released by the sudden movement.
   房间内的紧张情绪被突然的动作释放了。
3. 3. After a long day at work, she decided to relax with a hot bath.
   在工作了一整天之后，她决定泡个热水澡来放松一下。