An escape orbit is open — it doesn't come back — and is shaped like a parabola.
逃逸轨道是开放的——它不会回来——形状就像抛物线。
连线杂志
You then need to understand what is the amount of thrust or what is the amount of drag that I have to overcome in order to escape this orbit?
然后你需要知道推力是多少,或者为了逃离这个轨道,我必须克服的阻力是多少?
英语百科
Parabolic trajectory
(重定向自Escape 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).