The airline e-ticket was first used in the us in 1993, and it has substituted the traditional paper airline ticket gradually.

航空电子客票自1993年产生于美国以来，逐渐取代了传统的纸质客票。

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All the ten stations provide e-ticket services.

所有10个车站都提供电子售票服务。

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When you do it online you can print your e-ticket which you must remember to bring with you.

如果在线上操作，你可以打印你的电子票，一定记得把它带在身上。

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If you hold an e-ticket and your flight is delayed or canceled, you must redeem the e-ticket for a paper ticket to switch to another carrier.

FORBES: Fact and Comment

Currently you can't use an e-ticket to connect with a flight on a different carrier, because the airlines' computers cannot communicate with each other.

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Half the 45, 000 daily Shuttle passengers use an E-ticket already.

FORBES: Teaching an airline to fly