Now thrust could be generated (for “free” again) at periapsis, progressively increasing the altitude of apoapsis.

这时可以「免费」在近心点产生推力，渐渐将远心点的高度提升。

The repeated thrust applications at apoapsis would raise periapsis from inside to outside the stationary orbit.

重复在远心点施以推力，会将近心点由同步轨道内提升到同步轨道外。

Now thrust could be generated (for “free” again) at periapsis, progressively increasing the altitude of apoapsis.

这时可以「免费」在近心产生推力，渐渐将远心度提升。

The repeated thrust applications at apoapsis would raise periapsis from inside to outside the stationary orbit.

重复在远心施以推力，会将近心由同步内提升到同步外。

Now thrust could be generated (for “free” again) at periapsis, progressively increasing the altitude of apoapsis.

这时可以「免费」在近心点产生推力，心点的高度提升。

The repeated thrust applications at apoapsis would raise periapsis from inside to outside the stationary orbit.

重复在心点施以推力，会近心点由同步轨内提升到同步轨外。

Now thrust could be generated (for “free” again) at periapsis, progressively increasing the altitude of apoapsis.

这时可以「免费」在近心点产生推力，渐渐将远心点的高度提。

The repeated thrust applications at apoapsis would raise periapsis from inside to outside the stationary orbit.

在远心点施以推力，会将近心点由同步轨道内提到同步轨道外。

Now thrust could be generated (for “free” again) at periapsis, progressively increasing the altitude of apoapsis.

这时可以「免费」在近产生推力，渐渐将远的高度提升。

The repeated thrust applications at apoapsis would raise periapsis from inside to outside the stationary orbit.

复在远施以推力，会将近轨道内提升到轨道外。

Now thrust could be generated (for “free” again) at periapsis, progressively increasing the altitude of apoapsis.

这时可「」在近心点产生推力，渐渐将远心点的高度提升。

The repeated thrust applications at apoapsis would raise periapsis from inside to outside the stationary orbit.

重复在远心点施推力，会将近心点由同步轨道内提升到同步轨道外。

Now thrust could be generated (for “free” again) at periapsis, progressively increasing the altitude of apoapsis.

这时可以「免费」在近心点产生推力，渐渐将远心点的高。

The repeated thrust applications at apoapsis would raise periapsis from inside to outside the stationary orbit.

重复在远心点施以推力，会将近心点由同步内到同步外。

Now thrust could be generated (for “free” again) at periapsis, progressively increasing the altitude of apoapsis.

这时可以「免费」在产生推力，渐渐将远的高度提升。

The repeated thrust applications at apoapsis would raise periapsis from inside to outside the stationary orbit.

重复在远施以推力，会将步轨道内提升到步轨道外。

Now thrust could be generated (for “free” again) at periapsis, progressively increasing the altitude of apoapsis.

这时可以「免费」在近心点产生推力，渐渐将远心点的高度提。

The repeated thrust applications at apoapsis would raise periapsis from inside to outside the stationary orbit.

在远心点施以推力，会将近心点由同步轨道内提到同步轨道外。