Parking is not allowed during the hours of darkness.
夜间禁止停放车辆。
In Denmark, there can be up to 17 hours of darkness per day in winter, and the average temperature is around 0℃.
在丹麦，冬天每天有长达17个小时的黑夜，平均气温在0℃左右。
Peter, meanwhile, had used the hours of darkness to strengthen his position.
而与此同时，彼得利用这几个小时的黑暗，加强了他的阵地。
Local reports say as many as 13 people may have been killed during the hours of darkness.
当地媒体报导说，多达13人可能已经在数小时前的黑暗中死亡。
Through the long slow hours of darkness he saw her lovely face and forgot that she did not love him.
在漫长的黑夜里，他看到了她姣美的面庞，忘记她并不爱他。
Avoid riding after dark or if the weather is bad. All cyclists are at risk during the hours of darkness.
避免在夜晚或天气恶劣的时候骑行，黑夜骑行，任何骑手都有危险。
Their hours of darkness were punctuated with 14 different recorded hospital sounds played at varying volumes.
当以不同的音量播放14种不同的医院录音时，他们的黑暗时间就推迟了。
What the birds really have is a clock-like mechanism which allows them to time hours of darkness or light in each day.
鸟类真正具有的是一种“似钟的装置”，使它们能从时间上区分每天黑夜或白昼的小时数。
I sometimes work until the break of dawn. The hours of darkness, silence and stillness almost feel timeless, infinite.
有时候我工作到黎明。那阵黑暗、宁静和寂静让人感到无限和永恒。
Plants that need more hours of darkness may only produce flowers under conditions that provide less light than darkness.
植物需要更长时间的黑暗可能的条件下才产生的花，提供不到光明与黑暗。
A second group lived in conditions akin to their natural habitat, with 16 hours of overcast day-like light, followed by eight hours of darkness.
第二组生活在与其自然栖息地类似的环境中，16小时白天似的光亮，然后8小时的黑暗。
By increasing or lessening the hours of darkness in each day, the scientists have been able to turn plant growth off and on like an electric switch.
用增加和减少每天黑暗小时数的方法，科学家已经能够控制植物生长，如同控制一个电器开关。
Israel said it had struck 40 Hamas targets during the hours of darkness, and Gaza health officials said new strikes this morning killed eight people.
以色列宣布，黄昏时分，他们已经袭击了40个哈马斯目标，而加沙健康机构表示，这个早晨的攻击杀死了8个人。
Equinox means equal night and with the Sun on the celestial equator, Earth dwellers will experience nearly 12 hours of daylight and 12 hours of darkness.
春分意味着在夜晚和太阳在天球赤道上的时间相等，地球上的居民将经历12小时的白天与黑夜。
Photocells activate lighting during hours of darkness and can be combined with timers and motion detectors to ensure they only work when you want them to.
光电照明激活在黑夜时间，可以用定时器和运动检测器结合起来，确保他们只工作时，你希望他们。
When kept in 12 hours of light and 12 hours of darkness the mice - which are nocturnal - began consuming more food when the lights were on as early as the first week.
研究人员将老鼠放在光照下12小时，黑暗中12小时。在有光照的情况下，老鼠(喜欢在夜间活动)开始摄入更多的食物，这种现象早在第一周就表现出来了。
It is commonly thought that much of the ozone- and haze-forming pollutants generated in metropolitan areas during a busy weekday are removed from the air during hours of darkness.
人们普遍认为，都市繁忙白天产生的大部分臭氧和烟雾在晚上的时候会消失。
At the edge of darkness, after about eight hours, I turned around and saw the Earth from our altitude at Hubble, 568 kilometers up.
在黑暗的边缘，大约8个小时后，我转过身来，从哈勃望远镜上看到了568公里高处的地球。
Summer hours were long, winter ones short; only at the spring and autumn equinoxes were the hours of daylight and darkness equal.
夏天的时间长，冬天的时间短；只有在春秋分点，白天和黑夜的时间才相等。
To boost your mood, it might help to give yourself some solid hours of true darkness at night.
想拥有一个健康的心情，最好是夜里留给你自己充足的时间和黑暗相处。
These clocks are sometimes set by the number of hours of light or darkness in a day, by the rhythm of the tides or by the seasons.
这些时钟有时根据一天中白昼或黑夜的小时数目设定，有时根据潮汐的规律或者季节设定。
Such sites would have continuous sun for approximately 243 days a year and never have a period of total darkness for more than 24 hours.
这些地点差不多连续243天都将受到太阳的照射，黑夜的总时间不会超过24小时。
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。
The days here drowse all their twelve hours in the sun, and silently sleep away the other twelve, wrapped in the mantle of darkness.
这里的白天十二个小时都在阳光里昏昏欲睡，另外十二个小时则在夜幕笼罩下悄然睡去。
For that reason, his Field of Light lies dormant during the hours of day light, but when darkness falls the bulbs flower in transfixing patterns of light and colour.
出于这个原因，他的灯光田园在白天的时候是关闭灯光的，但当夜幕降临时灯光开启后，“灯泡花朵”就会变得流光溢彩，令人惊艳。
I enjoyed the company of a downtown secretary who was 13 years my senior. I got used to waking up in darkness after a few hours' sleep.
从容享受与一个年长我13岁的，来自市中心的职业秘书的相处；也习惯了在少量的睡眠之后在黑暗中醒来。
"Those factors all combine to make the day of the equinox not the day when we have 12 hours [each] of light and darkness," Chester said.
“这些因素结合起来就造成了昼夜12小时等长的一天不可能是春秋分日，”切斯特说。
"Those factors all combine to make the day of the equinox not the day when we have 12 hours [each] of light and darkness," Chester said.
“这些因素结合起来就造成了昼夜12小时等长的一天不可能是春秋分日，”切斯特说。
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