The intensity distribution on a screen from dark to bright to dark again is called an interference fringe.
屏幕上的强度分布，从暗到亮再到暗，叫做一条干涉条纹。
When people suffer from a migraine, they often retire to a cave-like dark room. But exactly why does bright light hurt the migraine sufferer?
偏头痛的时候，人们总是会缩在洞穴一般的小黑屋里，可到底为什么明亮的光线会让偏头痛者感到难受呢？
These cells know which signal to send because they receive light input from our environments - bright says wake, dark says sleep.
这些细胞知道该打什么信号，因为它们从环境中接收到光线刺激，明亮时就表示人该醒着，昏暗时就该睡觉。
Also known as "h and chi Persei", this unusual double cluster, shown above, is bright enough to be seen from a dark location without even binoculars.
上图所示的这一亦称“h和chi英仙座”(“ h andchi Persei ”)的不同寻常的双星星群的亮度高到可以在一个暗处不用双筒望远镜就看到。
The average temperature on the planet is estimated to be between -31 to -12c but the ground temperature would vary from blazing hot on the bright side and freezing on the dark side.
这颗星球的平均温度预计在- 31C到- 12c之间，不过阳面的炙热和背面的阴冷形成了巨大的反差。
The average temperature on the planet is estimated to be between -31 to -12c, but the ground temperature would vary from blazing hot on the bright side and freezing on the dark side.
这颗星球的平均温度预计在- 31C到- 12c之间，不过阳面的炙热和背面的阴冷形成了巨大的反差。
You from the dark CIC to I body, bright eyes, like a breeze, send a shiver through the waves, and blows the dim shore.
你从黑暗中投到我身上的，明亮的眼光，像一丝微风，送一阵颤栗透过水波，又吹向朦胧的岸边。
They make great pets with their big personality and stunning colors, ranging from vibrant bright red, dark blue to lemon yellow.
斗鱼以独特的个性以及炫目的色彩而著称，颜色包括活力红、深蓝、柠檬黄等。
Or we could compare it with the sun. When clouds obscure the light from coming to the earth, it gets dark; but the sun is still as bright as before.
或者我们可以用太阳来比喻：当乌云遮住了太阳，阳光照不到地球，天色就会变暗，但是，这时太阳还是像以前一样明亮。
Uranus, the 7th planet outward from the sun, is barely visible to the unaided eye on a dark, moonless night. Tonight, the bright waxing gibbous moon erases Uranus from the blackboard of night.
作为绕太阳运转的第七位行星天王星，即使在黑暗无月的夜晚，用肉眼也几乎无法看见，今晚这样有明亮新月的天空就更不用说了。
The value ranges from 0 to 4 with 0 being a very dark eclipse and 4 a very bright orange or copper-red Moon.
代表非常暗的月食（月球几乎看不见），而4 则代表月球在全食时呈鲜亮橙或铜红色。
The value ranges from 0 to 4 with 0 being a very dark eclipse and 4 a very bright orange or copper-red Moon.
代表非常暗的月食（月球几乎看不见），而4 则代表月球在全食时呈鲜亮橙或铜红色。
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