radioastronomersBNC¹⁷³⁹⁹⁵⁺² 基本例句 🌏放射天文学家原型radioastronomer的复数 Candidates for more massive black holes were first provided by the active galactic nuclei and quasars, discovered by radioastronomers in the1960s. 活跃的银河核和类星体首先提供了更多质量庞大的黑洞候选者，在1960年无线天文学家发现了它们。 chinaufo.com