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。
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。
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。
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。
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。
She was fumbling around in the dark looking for the light switch.
她摸黑找电灯开关。
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。
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。
Light coloured, light weight clothes feel cooler in the sun than dark, heavy clothing.
浅色、重量轻的衣服在阳光下比深色、厚重的衣服感觉更凉爽。
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。
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。
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。
Turn on the light because it is too dark to see.
太暗了看不见，把电灯打开。
When it's dark, we may bump into things without the help of light.
当天黑时，我们可能会在没有光的情况下撞到东西。
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”。
It was dark at the time, and the traffic was light.
当时天色阴暗，路上的车辆很少。
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。
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。
They don't meet in the daytime; they meet either early before light, at dawn, or after dark, at night.
他们不在白天见面；他们要么在黎明前相遇，要么在黄昏后相遇。
If the light is too dark, it will affect people's eyesight.
光线太暗会影响视力。
David was only 4 years old, and was still afraid of the dark, so Mary left the hall light on when we slept.
大卫只有4岁，还怕黑，所以玛丽在我们睡觉的时候把大厅的灯开着。
David was only 4 years old, and was still afraid of the dark, so Mary left the hall light on when we slept.
大卫只有4岁，还怕黑，所以玛丽在我们睡觉的时候把大厅的灯开着。
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