But after the X-ray pulse passes through, the cloud fades to its normal brightness.
但当X射线脉冲通过后星云就暗淡下来回到通常的亮度。
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。
It is normal for white gold jewellery to lose brightness over time, but white gold wedding rings can be maintained with rhodium plating every few years or so.
白金珠宝随着时间的流逝失去光泽是很正常的事情，但是你可以通过每隔几年将其重新镀铑来使其保持光泽。
So the ANSI lumen spec, when measured under these conditions, does not accurately reflect the actual brightness the user will get in normal operation.
所以在这些条件下测得的ANSI流明参数并不能精确的反应用户在正常使用环境下获得的实际亮度。
It is not suitable to open lamp of normal temperature and it has more excellent brightness in sealed street lamp fixtures.
不适用常温敞开式灯具，在密封隧道灯具内亮度更好。
It is not suitable to open lamp of normal temperature and it has more excellent brightness in sealed street lamp fixtures.
不适用常温敞开式灯具，在密封隧道灯具内亮度更好。
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