I went out onto the road to start thumbing.我走到公路上,竖起拇指要求搭车。I began thumbing through the pages of a gardening catalogue.我随便翻起一本园艺目录。He had the drawer open and was thumbing through the files.他打开抽屉,翻看着档案。I started off, thumbing my way North.我动身了,一路免费搭车去北方。