WHEN companies want to emphasise a turnaround in their prospects they paint the past in a dark light so that the future can only appear brighter.
当公司想强调经营有望好转时，就将过去描述成一片黑暗，这样未来就不管怎样都是更加光明的。
The visual system detects patterns of light and dark and, building on experience, the brain creates a spatial map.
视觉系统可以探测到光亮和昏暗的模式，并且根据经验，大脑会创建一幅空间地图。
A tall girl, with light hair and rosy face, was leaning on Heidi, whose dark eyes sparkled with keen delight.
那是一个高个子的金发女孩，红扑扑的脸，倚在海蒂身上，她的黑眼睛里闪烁着深深的喜悦。
The calotype was revolutionary in its use of chemically treated paper in which areas hit by light became dark in tone, producing a negative image.
卡罗摄影法对化学处理纸的使用是革命性的，其中光照区域色调变暗，形成负像。
Rogers found that a chick's lateralisation depends on whether it is exposed to light before hatching from its egg—if it is kept in the dark during this period, neither hemisphere becomes dominant.
罗杰斯发现，小鸡的偏侧性取决于它在孵出蛋之前是否暴露在阳光下——如果在这段时间里保持黑暗，右脑或左脑都不会占优势。
Her hair floats like a banner in the breeze and in the early morning light she seems to glow against a background of dark trees.
她的头发像在微风中的旗帜一样飘动，在清晨的晨光中，她似乎在黑暗树木的映衬下闪闪发光。
Horseshoe crabs kept in the dark continuously for a year were found to maintain a persistent rhythm of brain activity that similarly adapts their eyes on a daily schedule for bright or for weak light.
人们发现，连续一年被关在黑暗的环境中的鲎仍然可以保持稳定的大脑活动节奏，这种稳定的节奏也使得它们的眼睛适应每日或明或暗的光线。
If the venue of your presentation is not adequately light-proof, select a dark-colored background and use any light color for text.
如果演示的地点不具备足够的防光性，请选择深色背景，并为文本使用任何浅色。
The light from the riverboat makes the dark scene a bit livelier.
河船的光线使黑暗的场景生动了一点。
In an old building in Peking University, a yellow light shone into the old and dark hours of the night.
在北京大学一栋老建筑里，一盏黄色的灯照亮了古老而黑暗的夜晚。
The sky must be very dark for a moonbow to be watched clearly—any bright light can obscure it.
要想清楚地观察到月虹，天空必须非常黑暗——任何明亮的光线都可能使它模糊。
On the edge of the jacket, there is a piece of cloth that gives off light in the dark.
夹克边缘的一块布料可以在黑暗时发光。
Never put yourself in a dark situation when you feel left out and find it hard to get on well with others, are you ready to light your lamp?
当你觉得被遗忘，发现很难与他人相处时，永远不要使自己处于黑暗中，你准备好点燃你的灯了吗？
A quirk of light causes a strange luminescence in its dark recesses, and as we emerge someone tolls the bell.
一束奇异的光线照亮了黑暗的山洞，我们进入到山洞里时有人敲响了钟声。
Except for a small light, the room was dark. But Anna had little trouble in her search.
屋子很暗，只有一盏小灯开着，就算是人类都很难在这种光线下找东西，何况安娜。
After so many long years of hopelessness, they represent a small glimmer of light for the people of a dark land.
在经历多年毫无希望的等待之后，这些改变对生活在黑暗中人们来说，是一丝微弱的光芒。
The rough waters in the trough scatter light in all directions, forming a dark line.
谷底汹涌的水体将光散射到各个方向，形成了一条暗线。
In rooms with a good deal of ambient light, a screen image with a dark background and light text tends to washout, but dark text on a light background will maintain its visual intensity a bit better.
在光线明亮的房间里，深色背景和浅色文本搭配的屏幕图像容易泛光，但是浅色背景搭配深色文本的视觉效果就好得多。
A feather is light what is light cannot be dark; therefore a feather cannot be dark.
羽毛很轻，它就不会黑，因此羽毛不黑。
Understanding this experiment sheds a brilliant light on the dark world of our inner motivations.
对这个实验的理解很好地解释了我们内在动机的阴暗世界。
For a number of other galaxies, astronomers can circumvent the dark-matter problem by observing how a galaxy bends the light of more distant galaxies.
对于一些别的星系，天文学家可以通过观测星系怎样扭曲更远的星系发出的光来规避暗物质的问题。
Her hair floats like a banner in the breeze and in the earlymorning light she seems to glow against a background of dark trees.
他的头发在微风的吹拂下想旗帜一样漂浮，在晨光中她在一片的黑暗树木的映衬下仿佛在发光。
The material for the couch should be a light velvet if there are dark hardwood floors, and a dark velvet if there are light hardwood floors.
如果地板是深色的，躺椅的面料就应该是浅色的天鹅绒；如果地板是浅色的，面料就应该是深色的天鹅绒。
Behind the colorful somata in the foreground, a pattern of light and dark in the background suggests anatomical distinctions.
多彩的神经元密质部分位于前景，背景上的明暗模式表明了结构上的差别。
In a clear sky from a dark location at the right time, a faint band of light is visible across the sky.
在天气晴朗时从一个较暗的地点，在适当的时间，可以看见跨过天空的微弱光带。
The first suspect was described as white, about 30, with a slim build, dark hair with a well-combed side parting, light stubble on his face and between 5ft 10 and 6ft tall.
第一个嫌疑人外貌为：一个30岁左右的白人，身材偏瘦，深色头发梳理整齐地分向两别，脸上略有胡茬，身高介于5英尺10英寸和6英尺之间。
Soon after the upgrades, Hubble took aim at a dark patch of sky, gathering infrared light for a total of four days to detect the very faintest objects.
更新后不久，哈勃便把目标锁定太空的一处黑暗区。在连续收集了四天红外光后，哈勃发现了极其微弱的物体。
A classic dark nebula, the Snake is a tendril of interstellar gas and dust about 650 light years away.
在经典黑暗星云中，蛇是星际气体和尘埃组成的卷须，长约650光年。
A classic dark nebula, the Snake is a tendril of interstellar gas and dust about 650 light years away.
在经典黑暗星云中，蛇是星际气体和尘埃组成的卷须，长约650光年。
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