短語詞組短語celestial gravitation navigation 天體引力導航方法radio celestial navigation 射電天文導航autonomous celestial navigation 自主天文導航celestial navigation trainer 天文導航教練器celestial navigation instrument 天文航海儀表automatic celestial navigation [航]自動天文導航radio celestial navigation system 射電天文導航系統(tǒng);無線電天文導航系統(tǒng)celestial navigation periscope 天文導航潛望鏡optical celestial navigation 光學天文導航 返回 celestial navigation