基本解释恒星鍾词组短语短語sidereal l clock 恒星時鍾Synchronizing Sidereal Clock 恒星鍾同步sidereal clock WESTBANK 恒星時鍾a sidereal clock 恒星時鍾专业释义天文學恒星時鍾恒星時計恒時鍾恒星鍾