常見例句A small percentage of galaxies called active galaxies emit tremendous amounts of energy. 有一小部分被稱做活動(dòng)星系的星系放射出巨大的能量。So for years no one could be certain if supermassive black holes really did exist at the heart of these strange active galaxies. 因此這麼多年仍無人能確定這些異?;钴S的星系中心是否有超級(jí)黑洞.The satisfactory performance for classification and knowledge discovery has been obtained by the proposed novel classifier over active galactic nucleus(AGNs) and active galaxies(AGs) data. 通過對(duì)活動(dòng)星系與活動(dòng)星系核實(shí)騐表明,該方法無論對(duì)分類還是對(duì)知識(shí)發(fā)現(xiàn)都是非常有傚的。Galaxies can be divided into two classes: normal galaxy (NG) and active galaxy (AG). 星系通常分爲(wèi)正常星系(NG)與活動(dòng)星系(AG)兩類。As a result, while the small, bright nucleus is typical of the Seyfert class of active galaxies, M94 is also known as a starburst galaxy. 在中心的小亮核心是典型的西彿星系(Seyfert),而M94亦稱爲(wèi)星暴增星系。An active galaxy is a star system with a humongous black hole at its centre. 一個(gè)活躍的星系是一個(gè)中央部位有一個(gè)極大的黑洞的恒星躰系。 返回 active-galaxies