基本解释恒星钟词组短语短语sidereal l clock 恒星时钟Synchronizing Sidereal Clock 恒星钟同步sidereal clock WESTBANK 恒星时钟a sidereal clock 恒星时钟sidereal clock更多词组专业释义天文学恒星时钟恒星时计恒时钟恒星钟