Do you want to fly standby?

你想飞候补吗？

That's called " flying standby, " or to be " on standby."

这就是所谓的“飞行​​待命” 或“待命” 。

Justine says, " it used to be free, but not anymore, " that is, flying standby.

Justine说，“以前是免费的，现在不是了，”也就是飞行待机。

For example, consider an airline deciding how much to charge passengers who fly standby.

例如，考虑航空公司决定向候机乘客收取多少费用。

" To fly standby" means to wait to see if there is room on a plane that is already full.

“to fly standby” 的意思是等着看已经满员的飞机上是否还有空位。