A: What are you doing with that book?
A：你拿着那本书在做什么？

B: I am just thumbing through it to find the map.
B：我只是在翻阅它找地图。

1) 快速翻阅

2) 搭便车

3) 用大拇指摸

1. 快速翻阅

verb

1. to turn the pages of a book or magazine quickly

2. to hitchhike

3. to touch or feel something with one's thumb