Locate the brightness control for your display device. It could be labeled brightness or Black Level.

找到显示设备的亮度控制。它可能标记为“亮度”或“黑色”级别。

youdao

The computing unit subtracts a black level signal component from each of the pixel signals amplified by the second amplifier.

计算单元从由第二放大器放大的每个像 素信号中减去黑电平信号成分。

youdao

There is a feeling among some black people that the level of racism is declining.

有些黑人感觉到种族歧视的程度正在减轻。

《柯林斯英汉双解大词典》

The title for the Black Satellites is the first for an African team at the Under-20 level, despite the dominance of African nations in the youth categories over the last decades.

VOA: standard.2009.10.17

So, if you use a black lamp or something and you excite something up to a higher energy level and then it relaxes back down to its lower energy state, it's going to emit a new wavelength of light, which is going to be visible to you.

如果你用一个紫外灯或别的,东西把某种分子激发到,更高的能级，然后它会掉回,到低能级，它就会释放,一个新的波长的光,这个光是可见的。

麻省理工公开课 - 化学原理课程节选

With a contrast ratio of 30, 000:1, the XV-Z15000 can discern fine, detailed differences between the darkest and lightest colors and provides superior black level reproduction.

ENGADGET: Sharp shows off the XV-Z15000 1080p projector

Is it structured to fend off the asset-eroding potential of triggers such as so-called Black Swan events, Black Monday-level market implosions, interest and inflation rate swings, war or an oil supply disruption?

FORBES: Prep Your Portfolio for Disaster With a Stress Test

"One of the problems we have is that because of apartheid... playing fields are not level and black business need partnership with established businesses where skills can be transferred, " he added.

BBC: South Africa trade unity plans slammed