Bicycles are a cheap yet efficient way to get to work.

自行车是一种既便宜又高效的上下班通勤方式。

"I started fixin' up ole bicycles fer poor kids."

“我开始为穷孩子们修理旧自行车。”

Of the seven bicycles we had, only two were fit for the road.

我们的七辆自行车中，只有两辆适合这种路。

They are riding their bicycles.

他们正在骑自行车。

Others rode on bicycles or on wooden horses.

其他人骑自行车或骑木马。

Bicycle lanes can relieve traffic jam by separating bicycles from cars.

自行车道可以把自行车和汽车分隔开，从而缓解交通拥堵。