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。
Objective To investigate the effect of different light-dark cycles on the growth and activity of mice.
目的探讨不同周期光暗循环对小鼠生长的影响。
Half were housed in a standard light-dark cycle of 16 hours of light (at 150 lux) followed by eight hours of total darkness.
其中一半田鼠被封闭起来并做周期性的光照实验，每个周期先用150勒克斯的光照持续照射16个小时，然后完全黑暗持续16个小时。
While most spiders in nature can see only light-dark intensity and movement changes, Web spiders can see and feel using many types of protocols.
尽管自然界中的大部分蜘蛛都只能看到明暗强度和动作的变化，但是Webspider却可以使用很多种协议来看和感知。
Their activities were recorded continuously. Result the change of spontaneous locomotor activity and leukocyte count were synchronized with the light-dark cycle.
结果小鼠自发运动活动周期与光暗循环周期一致；不同光暗周期对小鼠外周血白细胞计数及分类计数有不同影响。
Over the eight-week period of the experiment the mice inthe first and third groups gained almost 50% more weight than those exposed tothe natural light-dark cycle.
经过八周的实验，相比较于第二组暴露在自然光——黑暗循环下的老鼠，第一组和第三组的老鼠体重的增长幅度高出50个百分点。
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。
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。
We do think that exercise and food, caffeine, may be able to modulate in some way, so has some influence on circadian timing, but not as strongly as the light-dark cycle.
我们认为锻炼、食物、咖啡因能起到一些调节作用，这些会对昼夜节律有一些影响，但没有昼夜循环的影响强烈？
It was only the mice that changed their eating times that gained weight, taking on a body mass gain of about 50 percent more than their standard light-dark cycle counterparts.
那些改变进食次数的老鼠，与在正常日夜循环的环境下的老鼠，体重增加的比率多了50%。
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。
Everything is dark for me, and my poor eyes can neither see the snow nor the light.
对我来说，一切都是黑暗的，我可怜的眼睛既看不见雪，也看不见光。
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 dusk light was failing and the interior of the pickup was dark but she knew the occupant was staring at her.
黄昏的光线逐渐暗淡下来，皮卡内黑漆漆的，但她知道占有者一直在盯着她。
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。
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。
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。
Sometimes it was dark and sometimes light, and now they were very cold and again too warm.
有时天很黑，有时又很亮，现在他们又冷又热。
Massive objects like the sun can bend light, but colossal clouds of dark matter create "bubbles" in the cosmos.
巨大的星体，例如太阳能够使光弯曲，但是庞大的暗物质云会在宇宙中产生“气泡”。
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 dark green hexagon is the focus of the system; the light green hexagons are the supporting elements.
深绿色的六边形是这个系统的焦点；浅绿色的六边形是辅助性的元素。
If the light is too dark, it will affect people's eyesight.
光线太暗会影响视力。
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。
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。
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