The psychologists found that mice housed in a lighted room 24 hours a day exhibited more depressive symptoms than did similar mice that had a normal light-dark cycle.
心理学家发现，关在一天24小时灯火通明房间里的老鼠比关在按正常明-暗光线循环房间里的同类老鼠表现出更多的抑郁症状。
This light-dark cycle is good for our bodies to predict changes in the environment.
这种光暗循环有助于我们的身体适应环境的变化。
Objective To study the effect of different light-dark cycles on learning and memory in mice.
目的研究不同光暗循环周期对小鼠学习记忆的影响。
They might sleep in the day and work at night for example - which goes against the light-dark pattern.
例如，他们也许要在白天睡觉，晚上工作，这和昼夜循环相冲突。
The results showed that the influences of light-dark cycle on production of extracellular polysaccharide were species specific, and dependent on the growth phase.
结果表明，光暗周期对硅藻胞外多糖生产的影响具有种间特异性，且与细胞生长周期有关。
Objective To investigate the effect of different light-dark cycles on total and differential counts of leukocyte as well as spontaneous locomotor activity in mice.
目的探讨不同光暗周期对小鼠白细胞数量分类计数与自发运动活动的影响。
One group was totally blind. The other group was legally blind but could still make out light and dark.
研究人员拿两组盲人偏头痛者作对比，一组完全失明，另一组法定失明，但还分辨得出光和暗。
It is important that this underground room be kept dark. Light can cause potatoes to develop a poison called solanine.
但保持这个地下室阴暗是非常重要的，因为光会导致马铃薯产生一种茄碱的毒素。
So researchers took two groups of blind migraine sufferers. One group was totally blind. The other group was legally blind but could still make out light and dark.
研究人员拿两组盲人偏头痛者作对比，一组完全失明，另一组法定失明，但还分辨得出光和暗。
Because hydrogen atoms trap light, the young universe entered its "dark ages."
由于氢原子阻拦光线，年轻的宇宙进入了“黑暗时期”。
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。
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。
The dark silhouette of the castle ruins stood out boldly against the fading light.
城堡遗迹的黑暗轮廓在暗淡光线下显得格外突出。
Living alone was conceived to be negative—dark and cold—while being together suggested warmth and light.
独自生活被认为是负面的——黑暗寒冷——而与人一起则意味着温暖和光明。
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。
First and foremost, we believe that journalists have a responsibility to shine light in dark places, to give voice to those who are too often silenced and ignored.
第一个也是最重要的动机就是：我们认为记者有责任为黑暗的地区带去光明，为那些常常被压制和忽略的人说话。
In everyone's life there are moments in which you face the choice between dark and light.
在每个人的人生中都会有一些时刻你需要面对光明与黑暗之间的选择。
This means that it recognizes the opposites of good and bad, light and dark, giving and taking, as the aspects of one and the same energy.
这意味着它把这些对立的好与坏、光明与黑暗、给予和索取，看成是一体(one)的各个方面，看成是同一种能量。
While it emits no light, this dark matter far outweighs the Milky Way's hundreds of billions of stars, giving the galaxy a total mass one to two trillion times that of the sun.
这种黑物质不发光，但它远远重于银河系数以亿计的恒星，使银河系的总质量达到太阳的一至二万亿倍。
Due to the reasons such as light, dark areas often exist in common gray image, and in these areas the image detail can not be directly identified.
灰度图像由于光照等原因往往存在着较暗区域，并且这些区域的图像细节无法直接识别。
The magic in Heroes of Might & Magic V is currently divided in 4 schools: light, dark, summoning and destructive.
魔法门之英雄无敌五中的魔法分为四大类，光明、黑暗、召唤和破坏。
To make sure that the cameras are accurately recording small changes in reflected light, engineers look for a bright light against a dark background to provide a reference point.
为了确保相机准确地记录来自反射光的细微变化，工程师寻找暗背景上的亮光，来提供一个参照点。
The screens remained primarily dark, but small areas of glowing light were visible.
屏幕大部分还是黑色，但可以看见上面有一小块亮光。
Light and Shadow - Bright objects appear closer than dark objects. Light and from irregular surfaces also give depth cues.
光与影-明亮的物体看起来比暗物体更近。光线和不规则表面也会产生深度暗示。
Most of the time the lasers are dark, producing areas of light with low intensities with the occasionally brief but brilliant flashes of high - intensity light.
大部分的时间里激光是暗的，产生低强度的光区伴随着偶尔短暂的高强度光的闪烁。
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。
This means longer wavelengths of light are absorbed by the dark back of the eye, while the shorter wavelengths are scattered.
这意味着黑色素吸收更长波长的光线，较短波长的光线则被散射。
Scientists have known for a long time that the light of day and the dark of night play important roles in setting our internal clocks.
科学家们很久以前就发现，昼夜光线的变化对于设置生物钟起着重要的作用。
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 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。
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