a four-door
1. 解词释义
Four-door的字面意思是“四个门”，比喻为“轿车”。这是用的是提喻的修饰手法，用部分来代替整体。
2. 拓展范例
e.g. Americans used to like big four-doors, and gasoline used to be very inexpensive.
过去美国人喜欢大型轿车，那时汽油很便宜。
e.g. The foreign visitors rolled up to the hotel in a four-door.
外宾们乘着一辆轿车来到旅馆。
e.g. This four-door accommodates six people quite comfortably.
这辆轿车坐6个人还很舒服。
e.g. This morning we are going on a four-door tour of the city.
我们今天上午要乘大轿车到城里各处游览。
第三， 视野拓展
two-door car：双门轿车（左右两侧各一个车门）
fast back car：斜背式轿车
car with four independent wheels：四轮独立悬架式轿车
four door convertible car：四门车篷可折叠式轿车