考虑到夜晚也可以生存，并且可供选择的白天的“交易”完全被占用，它们自然选择偏爱那些成功在夜间进行捕食“交易”的蝙蝠。
Given that there is a living to be made at night, and given that alternative daytime trades are thoroughly occupied, natural selection has favoured bats that make a go of the night-hunting trade.
在恐龙主宰着白天的局势的时代，我们的哺乳动物祖先之所以能够勉强生存下来，可能只是因为他们找到了在夜间谋生的方法。
In the time when the dinosaurs dominated the daytime economy, our mammalian ancestors probably only managed to survive at all because they found ways of scraping a living at night.
在人们无法找到路的情况下，许多在白天开始的旅行可能变成夜间冒险。
Many trips that start out in daylight will probably become nighttime adventures when people can't find their way.
而采用存储工厂，他们就可以利用夜间的多余电力来满足白天的峰值需求。
But with a storage plant, they could use the extra electricity made at night to satisfy their daytime peak demand.
可以使用这个功能，根据使用过程中的周期变化(例如从白天的交互式使用转换到夜间的批处理工作)来调优数据库性能。
This feature can be used to tune database performance according to periodic changes in use, such as switching from daytime interactive use to nighttime batch work.
他的工厂将在繁忙的白天时间生产电，夜间就会利用氢气来分离水。
His plants would produce electricity during peak daytime hours and be used to dissociate water to make hydrogen by night.
大多数地区的夜间风能高于白天。
作为一个小规模的造型专家，罗伊对确定白天凉爽和夜间保暖的过程最感兴趣。
As a small-scale modeling expert, Roy was most interested in determining the processes that drive the daytime cooling and nocturnal warming effects.
是的.她知道一周要上18个小时的课.但她想问问你们这里有没有夜间的课程.因为她白天要帮她阿姨干活.
Yes, she knows she must go to school for 18 hours a week, but she wants to know if she can have any classes at night, because she helps her aunt out during the day.
但是他也建议白天的小睡不应睡得太晚，否则会影响夜间的睡眠。
He warns, however, that napping must not be done too late in the day or it will interfere with night-time sleep.
他们面临一个独特问题，Nakhamkin说，他们白天的电力负荷远远超过夜间，与常规模式正好相反。
They had a unique problem, Nakhamkin said, in that their daytime load far exceeded their nighttime load, by a vast amount.
他们面临一个独特问题，Nakhamkin说，他们白天的电力负荷远远超过夜间，与常规模式正好相反。
They had a unique problem, Nakhamkin said, in that their daytime load far exceeded their nighttime load, the opposite of the regular pattern.
白天小睡会把夜间的熟睡时间偷走几个小时呢。
大部分LotusQuickr客户都是跨国公司，因此它们的负载在白天和夜间几乎都是相同的。
Most Lotus Quickr customers are global companies, so their workload is almost the same during daytime and nighttime. Therefore, adjust the Max concurrent agents setting from the names.nsf.
白天，他的目光尽朝埋藏硬币的方向望；夜间，如果有只迷途的猫弄出一点声响，他就以为是有人来抢他的钱。
All day, his eye wandered in the direction of the treasure; and at night, if some stray cat made a noise, the cat was robbing him.
这些发现将有助于解释为何那些夜间贪杯的人会夜里失眠而白天的睡意连绵，同时还伴有慢性的健康危害。
The findings might help explain why those who frequently drink often suffer from insomnia at night and sleepiness during the day, as well as more long-term health effects.
在一年里这两个时间点上，太阳出现在赤道的正上方，并且在地球上绝大多数地方，白天与夜间的长度是相同的。
At these times of the year, the sun appears to be directly over Earth's equator, and the lengths of the day and the night are equal over most of the planet.
我最近也不大上电视节目了。而之前差不多一年，我一直出现在白天各种的谈话节目中，和大量的夜间新闻节目。
I don't get on TV much anymore, though there was a year or so when I appeared on every major daytime talk show and plenty of nightly news programs.
对于与会者的一部分来说，白天高层的会议只不过是一系列接待活动，晚宴，夜间酒会以及之后的聚会的前奏。
For a certain subset of the attendees, the high-minded conferences during the day are simply prologues to a series of receptions, dinners, nightcaps, and after parties.
这架名为“太阳驱动”的飞机有着与空客A340一样宽的翼展，夜间飞行完全由白天吸收的太阳能驱动，共飞行了26小时零9分钟。
Solar Impulse, whose wingspan is the same as an Airbus A340, flew 26 hours and 9 minutes, powered only by solar energy stored during the day.
即使猎物拥有很好的感知系统，注意到了食肉动物正在靠近，夜间攻击的成功率也可能比白天攻击的成功率高。
Even if the prey had a good sensory system to notice a predator closing in, the success rate of a nocturnal attack may be higher than a diurnal attack.
在这个群峰环绕、安详的卫戍小镇上，白天温柔的声响总是变成夜间温柔的窃窃私语。
In this sedate garrison town ringed by jagged peaks, the gentle thrum of the day is usually reduced to a whisper by night.
只在夜间睡眠。尽可能避免白天睡觉。白天小睡会把夜间的熟睡时间偷走几个小时呢。把白天的睡觉时间限定为20分钟，权当一个恢复体力的小盹。
Sleep only at night. Avoid daytime sleep if possible. Daytime naps steal hours from nighttime slumber. Limit daytime sleep to 20-minute, power naps.
一些大多数人不知道的是，他们白天的活动也影响他们的夜间视力。
Something that most people do not realize is that their daytime activities also effect their nighttime vision.
一些大多数人不知道的是，他们白天的活动也影响他们的夜间视力。
Something that most people do not realize is that their daytime activities also effect their nighttime vision.
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