So, it means to move from an elliptical orbit to a parabolic orbit?
那么,就意味着需要从椭圆形轨道转到抛物线形轨道?
隐藏人物 原声版
The problem is when the capsule moves from an elliptical orbit to a parabolic orbit.
棘手的是,如何能让太空舱从椭圆形轨道转到抛物线形轨道。
英语百科
Parabolic trajectory
(重定向自Parabolic Orbit)
In astrodynamics or celestial mechanics a parabolic trajectory is a Kepler orbit with the eccentricity equal to 1. When moving away from the source it is called an escape orbit, otherwise a capture orbit. It is also sometimes referred to as a C3=0 orbit (see Characteristic energy).