spaceflight是什么意思？

There is no doubt that spaceflight entails risks, and to pioneer a new mode of travel is to face those risks, and to reduce them with the benefit of hard-won experience.

Private spaceflight could lie within reach of rich civilians in a few years.

This only applies to American space activities, but the hope is that it will help standardize a set of norms in the dawning commercial spaceflight industry throughout the world.