It found one-in-two business travellers frequently take a red-eye flight because they must be reachable during business hours.

研究发现，50%的商务旅行者经常乘坐红眼航班，因为他们必须在上班时间方便与同事联系。

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A "red eye" is an overnight airplane flight.

“红眼(red eye)”指的是夜间飞行。

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Would you like the morning flight, afternoon flight, or red-eye flight?

您是喜欢上午航班、下午航班还是夜间航班？

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The night of his graduation from Stanford he took a red eye flight to New York to start with Bessemer.

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Stephen Valerie, who sat near Simpson on a red-eye flight to Chicago the night of the killings, described Simpson as a jovial passenger.

CNN: simpson

Not long off a red-eye flight from New York, I've returned to a country where the public attitude to immigration has politicians worried.

BBC: The human traffic jam