大路上出现了一辆自行车。
A bicycle came into sight on the main road.
那辆车横冲过马路，撞上了一个骑自行车的人。
The vehicle careered across the road and hit a cyclist.
在伦敦骑自行车，你可得有胆量。
You need strong nerves to ride a bike in London.
他给自己的自行车上了油，给轮胎充了气。
He oiled his bike and pumped up the tyres.
男孩子们骑着自行车在街上兜风。
The boys were riding their bikes around the streets.
自行车组织正在为全国自行车周活动作准备。
Cycle organizations are gearing up for National Bike Week.
昨天骑了那趟自行车，我觉得浑身酸痛。
I'm really stiff after that bike ride yesterday.