英语语法分析

It's the airline's policy not to overbook its flights.

这家航空公司的政策是不超额订出航班。

《柯林斯英汉双解大词典》

Planes are crowded, airlines overbook, and departures are almost never on time.

飞机拥挤不堪，航线超额订出，起飞几乎从来没有准时过。

《柯林斯英汉双解大词典》

Don't overbook.

不要过多预订。