不常乘坐联盟航班的人能从联盟那里得到的唯一真正好处就是便宜的环球机票。
The only real benefit infrequent flyers can draw from an alliance is an inexpensive round-the-world fare.
假如给了你一张免费机票让你作环球旅行并沿途作五处逗留。
Imagine that you are offered a free air ticket that lets you travel around the world and make five stops along the way.
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