A bicycle came into sight on the main road.
大路上出现了一辆自行车。
A bicycle is often more convenient than a car in towns.
在城镇骑自行车常常比开车更方便。
When the traffic's this bad, a bicycle really comes into its own.
在交通如此拥堵的时候，自行车就显出了它的价值。
Statistics show that far more people are able to ride a bicycle than can drive a car.
统计资料表明，会骑自行车的人比会开汽车的人多得多。
We went for a bicycle ride on Sunday.
我们星期天骑自行车兜风了。
The height of the bicycle seat is adjustable.
这辆自行车车座的高度可以调节。