autobicycle

例句：

1. 1. I used to ride my bike to school every day.
   我过去每天骑自行车上学。
2. 2. She bought a new bicycle for her birthday.
   她生日时买了一辆新自行车。
3. 3. The bicycle was old and in poor condition.
   这辆自行车旧且状况不佳。