cab  
noun [ C ] uk/kæb/ us/kæb/
  (PART OF VEHICLE)     
  (卡车、公共汽车、火车等大型车辆的)驾驶室
the separate front part of a large vehicle, such as a truck, bus, or train, in which the driver sits
   (VEHICLE)        
B1 出租车,计程车,的士
a taxi
  It'll save time if we go by cab. 我们打车去能节省时间。 
 See also: minicab 
  (旧时的)出租马车
in the past, a vehicle pulled by a horse, used as a taxi