thumb a ride

例句：

1. 1. He put his thumb on the doorknob and turned it.
   他用手指按着门把手转动它。
2. 2. She held her thumb up to show she was okay.
   她竖起大拇指表示自己没事。
3. 3. The artist used his thumb to hold the brush in place.
   艺术家用拇指握住画笔。