Shall we walk or take a cab?我们步行还是坐计程车?
We rode through the park in an open cab.我们坐敞篷马车通过了公园。
You mustn't break the rule that no one but drivers can enter the cab.除了司机任何人都不能进入驾驶室,你不能违反规定。

cab, carriage, coach
参见carriage条。