When one is firing, its brightness can exceed a thousand normal galaxies.

当一个类星体爆发时，它的亮度可以超越一千个常规的星系。

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The experiment results show that the cover algorithm has good robustness and high classifying accuracy over Normal Galaxies and stars datasets.

对正常星系和恒星两类光谱数据进行实验，结果表明，覆盖算法具有较好的鲁棒性、较高的分类正确率。

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Near the quasars in time are other, normal galaxies that have likely just passed through a quasar phase, as seen in images released earlier this month.

本月早些时候公布的一些图片显示，在类星体周围适时出现的，是其他那些正常的，刚刚经历了类星体阶段的星系。

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If it were all normal, there would be far less collapse, and in all probability no galaxies (so, once again, no humans).

ECONOMIST: Astronomy

The analysis of the CMB data, released last Thursday, indicates that only 15.5% of the Universe's matter is what we would call "normal" - that is, the atomic material from which planets, stars and galaxies are built.

BBC: Planck telescope: A map of all the 'stuff' in the cosmos