thumb是什么意思啊?如何背?

thumb是什么意思啊?如何背?

名词 n. 1.拇指[C]The little child took her ear between her thumb and forefinger and tugged it playfully. 小孩用大拇指和食指捏住她的耳朵,拉着玩。 2.一拇指的宽度[C]3.(动物)第一指及物动词 vt. 1.用拇指翻动These books were badly thumbed. 这些书都给翻烂了。 2.笨拙地摆弄3.【口】(在路边)竖起拇指要求搭车;靠搭便车旅行He couldn't afford the fare; he thumbed his way all over Europe. 他付不起车费,于是他搭便车走遍欧洲。 不及物动词 vi. 1.用拇指翻书;迅速翻阅He thumbed through the directory to look for her number. 他翻阅电话号码簿找寻她的号码。 2.【口】竖起拇指要求搭车I went out onto the road to start thumbing. 我走到公路上,竖起拇指要求搭车。