The habit of travelling by aeroplane is becoming more prevalent.

机旅行的习惯变得越来越盛行。

The great virtue of air travel is speed.

机旅行的最大优点是速度快。

He was on standby for the flight to New York.

他在等退票或余票，一旦有票便机前往纽约。

Nowadays people travel by plane.

如今人们机旅行。