bus available pulse

例句：

1. 1. I need to catch the nextbus to work.
   我需要赶上下一班去上班的公交车。
2. 2. The bus driver waslate for his shift.
   公交司机迟到了。
3. 3.We took a bus to the nearest citycenter.
   我们乘公交车去了最近的市中心。