n.拇指
v.翻阅；示意要求搭车
Don't suck your thumb; it's so dirty. 别舔手指头，太脏了。
He caught his thumb in the door. 他的拇指让门夹了。
用作动词 (v.)He thumbed through the address book looking for the number. 他翻阅地址簿，寻找号码。
You ought to thumb through this art book sometime. 你什么时候应该浏览一下这本美术书。
They managed to thumb a lift to Paris. 她们设法搭便车到达巴黎。
If we miss the last train we can always thumb a lift home. 如果我们赶不上末班火车，我们总可搭便车回家。
