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.
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.
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.
中国互联网信息中心的统计报告显示目前网上交易存在的最大问题仍然是诚信相关的产品质量、服务和安全问题。
The statistic report from CNNIC (China Internet Network Information Center) says that the most serious problems are related with trust such as quality of goods, service and security.
中国互联网信息中心的统计报告显示目前网上交易存在的最大问题仍然是诚信相关的产品质量、服务和安全问题。
The statistic report from CNNIC (China Internet Network Information Center) says that the most serious problems are related with trust such as quality of goods, service and security.
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