其身体质量指数是20，根据疾病控制中心数据显示，完全符合标准。

She has a body mass index (BMI) of 20—in the normal range, according to the Centers for Disease Control.

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然而，当星系中心质量超级大的黑洞“吞食”时，落入其中的物质便会升温，发出一道明亮的光，通过电磁波频谱可以显示出来。

But when supermassive black holes at the center of a galaxy feed, the material falling into them heats up, giving off a bright glow across the electromagnetic spectrum.

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对太空深处的长期观测研究发现了一些巨大的物体：一些迹象显示宇宙初星系中心有特大质量的黑洞在吞噬着物质尘埃。

Long gazes into deep space have turned up something huge: Signs of super massive black holes devouring matter at the hearts of the universe's first galaxies.

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