短语词组短語cometary pause 彗頂cometary plasmas 彗星等離子躰cometary dynamics 彗星動力學cometary chemistry 彗星化學cometary y 彗星的cometary coma 彗發cometary head [天]彗頭cometary astronomy [天]彗星天文學;彗星天文cometary physics 彗星物理 返回 cometary