vi.翘起拇指请求搭乘（过路汽车），示意请求搭便车（thumb的现在分词形式）； 双语释义：n.(名词)[C]拇指 the short thick finger at the side of your hand英英释义： thumbn.the thick short innermost digit of the forelimb同义词：pollexthe part of a glove that provides a covering for the thumba convex molding havin