bike的原型

原型是bicycle，例如：

1、A bicycle came into sight on the main road.大路上出现了一辆自行车。

2、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。

3、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。