thumb

用拇指触摸或覆盖。

To touch or cover with the thumb.

快速翻阅(书籍)以粗略阅读

To turn the pages of (a book) in order to read it cursorily.

用拇指示意,例如招车时

To gesture with the thumb, for example when flagging a ride.

搭便车

To hitchhike.

用拇指或手指弄脏或磨损；因频繁使用而弄脏或磨损

To soil or wear with the thumb or the fingers; to soil, or wear out, by frequent handling.

用拇指操作(物体)；尤其是拉回手枪的击锤或打开转轮

To manipulate (an object) with the thumb; especially, to pull back the hammer or open the cylinder of a revolver.

快速射击(单动手枪),通过拉击锤同时保持扳机按下

To fire (a single action revolver) quickly by pulling the hammer while keeping the trigger depressed.