排序题解题方法 — 英语词汇题

将下列句子排成逻辑连贯的语段（排序题）：① It also saves commuters both time and money. ② As a result, fewer private cars enter the city center during rush hours. ③ Carpooling reduces the total number of vehicles on the road. ④ Therefore, urban traffic becomes smoother and air pollution is relieved.