mushotzkyCOCA²¹⁵³⁸⁹ 例句 “ If two galaxies collide and each possesses a supermassive black hole, there should be times when both black holes switch on as AGN, ” said coauthor Richard Mushotzky, professor of astronomy at UMCP. “如果两个星系碰撞和每个人都拥有一个超大质量的黑洞,应当有两个黑洞的时候,作为活动星系核转,说:”作者之一理查德 Mushotzky,天文学教授 UMCP。 blog.sina.com.cn