vi.翘起拇指请求搭乘（过路汽车），示意请求搭便车（thumb的过去式与过去分词形式）； 双语释义：n.(名词)[C]拇指 the short thick finger at the side of your hand英英释义： thumbed[ θʌm ]adj.(of pages) worn or soiled by thumb and fingers by frequent handling or turning"well-thumbed pages of the dictionary"