periapsis
n. [天] 近拱点
复数 periapses
例句
Periapsis in earth orbit; the point in its orbit where a satellite is nearest to the earth.
以地球为中心的最近点;人造卫星轨道上离地球中心最近的点。
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。