A red|eye flight is any flight departing late at night and arrivingearly the next morning. The term red|eye, common in NorthAmerica, derives from the fatigue symptom of having red eyes,which can be caused or aggravated by late|night travel. Insidethe US these flights almost exclusively travel from the West tothe East. These flights are very low cosplayt since significantly lesspeople acquire them due to the inconvenience of touring so lateat evening.
红眼航班是深夜出发、第二天凌晨抵达的航班，在北美非常容易见到。因为深夜飞行致使两眼发红的疲态，所以被称作红眼。在美国国内，红眼航班基本都是从美西飞到美东。这种航班票价非常实惠，由于深夜旅游非常不便捷，所以极少有人买。
For example:
A red|eye flight is much more economical.
红眼航班更经济便宜点。
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