短語詞組短語oblateness in circular orbit 圓形軌道扁率sasayite in Sunsynchronous orbit 太陽同步軌道衛(wèi)星In -orbit Test 在軌測試in -orbit 軌道重量mass in earth orbit 地球軌道質(zhì)量Astronauts in Higher Orbit 更高的軌道move in an orbit 沿軌道運行Eagle In Lunar Orbit 繞月軌道上的登月艙 返回 in orbit