economy class

例句：

1. 1.We decided to take the economy class for the flight.
   我们决定买经济舱的票。
2. 2.The economy class was much cheaper than the business class.
   经济舱比商务舱便宜多了。
3. 3.He booked a ticket on the economy class for a short trip.
   他买了一张经济舱的票，准备去短途旅行。