This allows us to study the motions of the Jovian moons without taking into account the motion of Mercury. 明白了這個道理，我們得以研究環(huán)繞木星的衛(wèi)星的運行而不計水星的影響。
In a Jovian stationary orbit, a spacecraft goes around the planet at the same speed as the ionosphere. 在木星的同步軌道上，太空船環(huán)繞行星的速度與電離層相同。