HDE 226868 might be under- massive for its spectral type, which would make Cyg x-1 less massive than previously calculated.是什么意思_HDE 226868 might be under- massive for its spectral type, which would make Cyg x-1 less massive than previously calculated.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句