The difference between these two scenarios may have implications for how these supernovae can be used as "standard candles" — objects of a known brightness — to track vast cosmic distances.

这两种图景之间的差异可能会与超新星被当成“标准烛光”(也就是亮度已知的天体)来测量遥远宇宙距离的方式有关。

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In our standard video test (running an MPEG4 video clip on loop, WiFi on, screen at roughly 65 percent brightness), the iPad 2 managed an astonishing 10 hours and 26 minutes of non-stop playback.

在标准的视频测试中(循环播放MPEG4视频，打开WiFi，屏幕亮度设为65%)，iPad 2得到了10小时26分的好成绩。

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American National standard Institute standard for measuring brightness and resolution of a display device.

美国国家标准协会标准为测量一台显示设备的亮度和决定。

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Germany's DNP has unveiled the Supernova Flex Screen, which claims to deliver "ten times" the contrast and "double" the brightness compared to standard screens when used in daylight.

ENGADGET: DNP unveils daylight-friendly Supernova Flex Screen

Because RR Lyrae stars have the same average brightness, astronomers use them as standard candle distance indicators.

FORBES: Astronomers Confirm Milky Way's Most Distant Stellar Stream

The F8500 delivers the same brightness and eight times the black levels as standard LED TVs, thanks to Samsung's proprietary Deep Black Algorithm and Real Black Pro II.

ENGADGET: Samsung, Flo Rida introduce massive Giga Sound MX-FS9000 speakers (update: hands-on video)