常見(jiàn)例句Subsatellite point on the equator; 衛(wèi)星下赤道點(diǎn);interval of subsatellite point path 星下點(diǎn)軌跡間距Track of subsatellite point 星下點(diǎn)軌跡tethered subsatellite 繩系衛(wèi)星 返回 subsatellite