假如你的行李过重了，你得付额外的运费。
美国航空公司以1.184亿美元在上一季度的行李托运费收入中遥遥领先。
American Airlines led the way last quarter with $118.4 million in baggage revenue.
这些公司的飞机都需要更新换代，新的收入来源，诸如行李托运费，在一定程度上解决了这些公司的订金支付问题。
All of them are in need of an upgrade and finally have some money to put down a deposit — thanks, in part, to all those new revenue streams, like baggage fees.
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