经济舱的用法和样例：
例句
-
我坐经济舱旅游是因为便宜。
I travel economy class because it is cheaper. -
我要一张3天回程的经济舱来回票。
I'll need an economy class, three-day return. -
一个经济舱座位，对吗？
One economy class seat, is that right? -
他说经济舱太不舒服了，所以外出旅游他总是坐头等舱。
He always travels first class, because he says tourist class is too uncomfortable.
