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

这时可「免费」在心点产生，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，会将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.

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」在近心点产生推力，渐渐将远心点的高度。

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

复在远心点施以推力，会将近心点由同步道内到同步道外。

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

这时可以「免费」在近心力，渐渐将远心的高度提升。

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

重复在远心施以力，会将近心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」在近产生推力，渐渐将高度提升。

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

重复在施以推力，会将近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，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「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。