“x-ray astronomy”的概念、定义、翻译、参考文献-科学参考

单词	x-ray astronomy
释义	x-ray astronomy [`eks´rā ǝ`strän·ǝ·mē] ^ASTRONOMY The study of x-rays mainly from sources outside the solar system; it includes the study of novae and supernovae in the Milky Way Galaxy, together with extragalactic radio sources.
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