星体的亮度大约分三个星等。
在同一时期内，X 射线光源亮度的增加速度要快得多。
The increase in brightness of the x-ray sources over the same period has occurred far faster.
最好的信号不仅取决于它的亮度，还取决于它与背景的对比度。
The best signal depends not only on its brightness but also on how well it contrasts with the background against which it must be seen.
有几年它的亮度一度达到了现在的太阳亮度的一万倍左右。
For a few years its luminosity flared up to about 10,000 times the present-day luminosity of the Sun.
人们很容易降低窗户的亮度以保持凉爽。
People could simply make the windows less bright to stay cool.
吴说，这将类似于我们获得月亮光照的方式，但他预测，人造月亮的亮度将是真实月亮的8倍。
Wu said it would be similar to how we get moonlight, but he predicted that the man-made moon would have eight times the brightness of the real one.
安全起见，研究人员建议，我们应该比以前更少使用电脑，或者在睡觉前尽可能地把屏幕亮度调低。
To be on the safe side, the researchers suggest that we should use computers less than before, or turn down our screens as much as possible before sleeping.
它们的视网膜细胞对中等亮度光线中的红色成分也不太敏感。
Their retinal cells are also not excessively sensitive to red components of moderately bright light.
这种新灯泡的耗电量还不到目前用于生产相同亮度的传统灯泡的一半。
The new bulbs require less than half the electricity consumed by the conventional bulbs currently used to produce the same amount of light.
受试者情绪的黑暗与她的粉红色和波尔卡圆点衣服的明亮度之间也存在有趣的对比。
There is also an interesting contrast between the darkness of the subject's mood and the lightness of her pink and polka dot clothes.
饱和度和亮度也影响到我们的感觉。
The saturation and lightness of light also affect our perceptions.
太阳亮度以11年为周期波动。
它还将测量每一道激光反射的光亮度。
It also will measure the brightness of each laser reflection.
有些见证者把这个火球的亮度比作太阳。
Some witnesses compared the fireball's brightness to the sun.
你可以用亮度-对比度来让颜色更犀利。
天文学家用星等和光度来描述恒星的亮度。
Astronomers describe star brightness in terms of magnitude and luminosity.
上面的图表显示了北半球云层亮度的变化。
The graph above shows how the brightness of the clouds has changed in the Northern Hemisphere.
暗框使画的亮度更明显。
Accentuate the dark frame accentuates the brightness of the picture.
用手指在手机屏幕左侧上下滑动可以改变屏幕的亮度。
When you slide your finger down the left side of the device screen, the brightness changes.
在计算机模型中，它们具有极低温低亮度和反常的颜色。
Computer models characterized them with unusually cool temperatures, low brightness and atypical color.
作为对比，木星的亮度也只有我们的太阳的十亿分之一。
By comparison, Jupiter is one-billionth the brightness of our sun.
进入电脑显示设置，做些必要的调整以配合房间的亮度。
Go to your computer display Settings and make the necessary adjustments to match the brightness of the room.
超新星能短暂地发出相当于整个星系亮度的光。
Supernovas can briefly shine as brightly as an entire galaxy.
星云旋转和转动的速度降了下来，亮度也变暗了。
低亮度的照明会。
大气状况和观察者的视觉灵敏度也会降低边缘亮度。
Atmospheric conditions and the visual acuity of the observer will often reduce limiting magnitude.
同时要检查看看投影仪的亮度是否比房间的亮度强。
Also, check to see if the projector is bright enough to overpower the room's lighting.
恒星的表面温度部分取决于它的质量，并影响它的亮度和颜色。
The surface temperature of a star depends in part on its mass and affects its brightness and color.
星系的红外亮度让小组成员可以估计出超新星发生的预期速率。
The infrared brightness of the galaxies allowed the team to estimate how many supernovae should occur.
星系的红外亮度让小组成员可以估计出超新星发生的预期速率。
The infrared brightness of the galaxies allowed the team to estimate how many supernovae should occur.
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