[baɪk]，一个音节。

n. 自行车脚踏车

vi. 骑自行车（或摩托车）Could you mend my bike for me?

你能帮我修一下自行车吗

The bike is rusty but usable.

自行车生锈了，但还能骑。

I took my bike in for repair.

我把自行车送去修了。

I usually go to work by bike.

我通常骑自行车上班。

Riding a bike is great exercise.

骑自行车是很好的锻炼。