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。
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 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。
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%。
It was getting dark so I switched on the light and drew the curtains.
天快黑了，我打开灯，拉上了窗帘。
The use of light and dark symbolizes good and evil.
用光明与黑暗来象征善与恶。
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。
She was fumbling around in the dark looking for the light switch.
她摸黑找电灯开关。
Research suggests that babies learn to see by distinguishing between areas of light and dark.
研究显示婴儿是通过区分明亮区域和黑暗区域来学会观看的。
When you write, you light a bonfire in the spirit world. It is dark there.
当你写作时，你点燃了一簇精神世界的篝火。那里很黑。
They turn the light on at dark.
他们天黑时开灯。
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。
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。
We've all got both light and dark inside us.
我们每个人的内心都有光明和黑暗两面。
Here we have a photo with light and mid tones but no dark tone.
这里我们有一张有浅色调和中色调的照片，但是没有暗色调的。
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。
Who wants light cheese, and who wants dark cheese?
谁想要浅色奶酪，谁想要深色奶酪？
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。
She groped blindly for the light switch in the dark room.
她在黑暗的房间里摸索电灯开关。
I had to feel about in the dark for the light switch.
我得在黑暗中摸索寻找电灯开关。
Please turn on the light. It's dark.
请把灯打开，天黑了。
It's dark. Turn on the light, please.
天黑了，请把灯打开。
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”。
He shone a light into a very dark place.
他把光照进一个非常黑暗的地方。
Turn on the light because it is too dark to see.
太暗了看不见，把电灯打开。
Turn on the light because it is too dark to see.
太暗了看不见，把电灯打开。
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