a vehicle composed of two wheels held in a frame one behind the other, propelled by pedals and steered with handlebars attached to the front wheel 自行车,脚踏车
verb
[noobj., with adverbial of direction]ride a bicycle in a particular direction 骑自行车 they had spent the holidays bicycling around the beautiful Devonshire countryside. 他们假期在德文郡乡村四处骑车旅游。
派生 bicyclist noun 语源
mid 19th cent.: from bi- 'two' + Greek kuklos 'wheel'