研究结果为一种长期存在的假设提供了最好的证据，即单半球睡眠是在生物寻找敌人的过程中进化而来的。
The results provide the best evidence for a long standing supposition that single hemisphere sleep evolved as creatures scanned for enemies.
石墨烯是一种只有单原子厚度的碳原子平面层——碳原子按蜂窝状晶格排列。
Graphene is a flat sheet of carbon just one atom thick—with the carbon atoms arranged in a honeycomb lattice.
这让亚利桑那大学的EricaCorral发现碳单原子层是一种理想的陶瓷增强剂。
This led Erica Corral of the University of Arizona to discover that carbon monoatomic layers are ideal for reinforcing ceramics.
这是一种性别决定的方法，叫做单倍二倍体。
This is a method of sex determination known as haplodiploidy.
该病毒是一种单链核糖核酸（RNA）病毒，属于沙粒病毒科。
The virus is a single-stranded RNA virus belonging to the virus family Arenaviridae.
在这些成绩单上所作的工作毫无意义，完全是一种浪费。
The pointlessness and sheer waste of effort in these school reports is quite something.
如果你仔细的观察的话，它试图给人一种单电子系统的感觉。
And, if you look carefully, it tries to give the sense of a one electron system.
它们可能脂肪量较高，但主要是单不饱和脂肪酸，是一种健康的脂肪。
They can be high in fat, but it's mostly monounsaturated, a healthy kind of fat.
单例模式是一种非常有用的设计模式，它允许你的类对外只提供一个实例，但是常犯的错误在于不止一个实例被创建。
The singleton is a useful design pattern for allowing only one instance of your class, but common mistakes can inadvertently allow more than one instance to be created.
交响诗都是单乐章的，所以我们又了解到一种音乐风格。
So tone poems are one in movement, and we have got other kinds of genres in music.
我们可以想象得到，单屏设计对于大手指的人来说是一种手指灵活性的挑战，但对我们还好——你可以只是触摸屏幕上的不同区域来移动屏幕以更改设置。
We can imagine the one-screen design will be too fiddly for anyone with big fingers, but it works for us - you can just zip around the screen touching various areas to change the Settings.
本文讨论的主题是单例模式，请将上述实现方式牢记于心，因为接下来的现象可能出现在任何一种实现方式中。
As I discuss the singleton, keep the above implementations in mind, although many of those phenomena can occur for any implementation of the singleton.
单提供白页和黄页中的一种或者这两种都提供，那么对于通过程序发现和使用服务，注册中心的条目的价值就很有限。
If only white, yellow, or both page data is provided, a registry entry is of limited value in the programmatic discovery and use of services.
部分应用是一种更广泛的技巧，它与局部套用类似，但是生成的函数并不限于单函数。
Partial application is a broader technique that resembles currying but does not restrict the resulting function to a single argument.
有效的利用你的时间是一种可以让你心情平静的方法，较少的关注在检查任务单上，更多的让每一天对于你和世界而言变得更有价值上。
One way to ease your mind that your days have been well spent is to focus less on checking tasks off a list, and more on making each day valuable to you and to the world.
单例模式是一种有用的控制类访问的途径，他能保证只有一个类实例存在。
Singletons are a useful way to control access to a class, making sure that only one instance can exist.
抛物面一种有与单坐标轴平行的抛物截面和与该轴垂直的椭圆截面的平面。
A surface having parabolic sections parallel to a single coordinate axis and elliptic sections perpendicular to that axis.
它用利剑打击，然而没有一种利剑是单刃的，每把剑都有双刃，一边伤了人，另一边便伤了自己。
Now, no sword is simple. Every blade has two edges; he who wounds with the one is wounded with the other.
例如，通过随机折叠，核糖核酸酶(一种小型蛋白质)的氨基酸链能形成超过1040种不同的结构，单这一种蛋白质就需要数亿年的时间来探索。
For example, by random folding, the amino-acid chain of the enzyme ribonuclease, a small protein, could adopt more than 1040 different shapes, which would take billions of years to explore.
他们还在波导中嵌入了量子点(一种能释放单光子的微小半导体)作为代理来使原子与光子产生纠缠。
They also embedded quantum dots, tiny semiconductors that can emit a single photon at a time, in the waveguide as a proxy for atoms that could become entangled with the photons.
二人使用一种被称为氡变形的单处理技术创造出多种音频片段组成的声谱图，每种只有半秒长。
The pair used a signal-processing technique called the Radon transform to create spectrograms of a variety of audio clips, each just half a second long.
单件为我们提供了一种可以将 SQL语句中每一个UDF 进行聚集计算时需要的数据存储在另外的对象当中的方式。
The singleton provides us with the means to store another object that is used for the aggregation done in each UDF in the SQL statement.
一种常见用法是用于存储非线程安全类型的单例。
One common use is for storing a singleton of a type that is not thread-safe.
一项新研究发现，有一种稀有的单居性蜜蜂的巢穴看起来就像是一场春天婚礼的花束一般。
What appears to be part of a spring wedding bouquet is actually a nest for a rare species of solitary bee, a new study says.
但是现代遗传学技术表明，许多物种的雌性很明显是处于一种单配关系中，但所生育的后代却有着不止一个父亲。
But modern genetic techniques have shown that in many species females in apparently monogamous relationships often produce families that have more than one father.
以组合方式综合咖啡豆占了我们所有咖啡豆产品的很大一部分，每一种综合咖啡都与它的单品咖啡的特性保持一致。
The blends as a group make up a significant percentage of our whole bean coffee lineup, and each is as special in its own way as the most exotic single-origin coffee.
而六十年代研究的发现则恰恰相反，“双语者”比只懂一种语言的“单语者”得分更高。
Research in the sixties found the opposite. Bilingual people scored higher than monolinguals--people who speak only one language.
结果就是形成一种混合物，可以承受多于没有加入碳单原子层的氮化硅一倍的压力。
The result was a composite that was able to withstand twice as much pressure as unalloyed silicon nitride.
结果就是形成一种混合物，可以承受多于没有加入碳单原子层的氮化硅一倍的压力。
The result was a composite that was able to withstand twice as much pressure as unalloyed silicon nitride.
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