放射性核素释放的能量减半需要的时间范围是几分之一秒到几百万年，取决于原子的类型。
The time required for the energy released by a radionuclide to decrease by half (i.e., the "half-life") range from tiny fractions of a second to millions of years depending on the type of atoms.
比如说，秒就是根据铯原子内部的电子跃迁时间来下的定义，而米的定义则和光速有关。
A second of time, for instance, is now defined in terms of an electron transition of the cesium atom. And the meter is tied to the speed of light.
原子在两个能量等级之间震荡，所以钟的精确度为运行37亿年后误差不超过正负一秒。
The atom vibrates between two energy levels allowing the clocks accuracy down to a second in 3.7 billion years.
本周三晚23点59分59秒(美国东部时间早6点59分59秒)，全世界所有的原子钟会把这一天拨慢一秒。
Eastern time, atomic clocks around the world will add one second to the day.
并且这些原子的生命周期小于千分之一秒，它们的存在可以通过检测它们飞快消失之后留下的子原子而得到确认。
As these lived for less than a thousandth of a second, their presence was ascertained by examining the daughter atoms into which they quickly decayed.
遗憾的是，一秒钟的标准定义依赖于原子在绝对零度的条件，而实际的时钟需要在室温下运行，室温条件下电子壳层膨胀了。
Unfortunately, the standard definition of a second relies on what the atom does at a temperature of absolute zero. Real clocks need to run at room temperature, where the shell of electrons puffs up.
对于较大的原子钟而言，当前的方法是以测量带电原子或离子发出的微波干涉方法确定一秒种的长度。
As for larger atomic clocks, current models measure the interaction of microwaves with electrically charged atoms, or ions, to measure one second.
在形式上，一秒钟，或者说一次“滴答声”被定义为在小心受控条件下，微波能量喷发或是铯133原子吸收的9 192 631 770个循环。
One second is formally defined as 9, 192, 631, 770 cycles, or "ticks and tocks," of microwave energy emitted or absorbed by cesium-133 atoms under carefully controlled conditions.
在讨论原子级别时间的时候，物理学家用起皮秒（百万兆分之一秒）甚至飞秒（千万亿分之一秒）来都没任何不便。这是一方面。
Physicists have no trouble using, on the one hand, picoseconds (trillionths of a second) or even femtoseconds (quadrillionths of a second) to discuss time at the atomic scale.
早在两年前，有另一个研究小组宣称可将量子数据存储于原子核内2秒钟，但是他们并没有用电子手段读出数据。
Two years ago, a different research group reported storing quantum data for two seconds within atomic nuclei, but they did not read it electronically, Boehme said.
14秒后，温度是30亿度，第一个氘原子核形成了。
14 seconds later, the temperature became 3 billion degrees, forming the first deuterium atom.
研究小组证实，1000万个反质子和7亿个正电子共形成38个稳定的反氢原子，每一个的存在时间只有短短十分之二秒左右。
Theteam proved that among their 10 million antiprotons and 700 million positrons, 38 stable atoms of antihydrogen were formed, lasting about two tenths of asecond each.
这可以让原子的温度下降几百华氏度—比你想放入口中的任何东西都要冷得多—在不足一秒内。
This drops an atom's temperature a couple hundred degrees fahrenheit-much colder than anything you'd want to put in your mouth-in less than a second.
一年后，他们成功地让两个元素的原子核聚变，创造出了他们的首个113号元素原子核，但过了不到千分之一秒，它就衰变了。
A year later, they successfully fused two atomic nuclei from these elements, creating their first nucleus of element 113, but it decayed in less than a thousandth of a second.
吸电子基团能增强该类配合物对皮秒激光的限幅效果，而重原子效应则起相反的作用。
Electron withdrawing groups can enhance the limiting effect for this kind of complexes, but the effect of heavy atom ACTS opposite role.
通过脉宽为周期量级的超快强场激光脉冲与惰性气体原子的极端非线性相互作用，能够产生单个的阿秒量级的极端远紫外光脉冲。
Single isolated attosecond (as) extreme ultraviolet (XUV) pulses can be generated via the nonlinear optical interaction between intense few-cycle laser fields and noble gas atoms.
记住，如果铅笔偏离平衡点万分之一原子的距离，它就会在3秒内倒下，你也最好将铅笔和桌子尽可能地冷却到绝对零度。
Remember, if the pencil gets off center by even 1/10,000 the width of an atom, it will fall down in under 3 seconds.
格林尼治（平均）时坐标。这是格林尼治平均时，被调整到秒的整数值，它异于国际原子时。（参考）
UTC Universal Time Coordinated. This is Greenwich Mean Time, adjusted to be an integral number of seconds different from International Atomic Time.
放射性核素释放的能量减半需要的时间范围是几分之一秒到几百万年，取决于原子的类型。
The time required for the energy released by a radionuclide to decrease by half (i. e. , the "half-life") range from tiny fractions of a second to millions of years depending on the type of atoms.
飞秒激光脉冲提供了一种极强极高的电场能够超过价带电子的束缚力，使分子、原子的电子体系发生巨大变化。
An intense femtosecond laser pulse can provide an electric field strength which exceeds the electric field force of valance electrons that holds the electrons to their ionic cores.
最近研制的氢原子钟，对于超过1,000秒的平均时间间隔，其稳定度好到10 ~ (- 16)。
Recently developed atomic hydrogen masers have achieved stability well into the 10-16 domain for averaging time intervals beyond 1,000 SEC.
一座这样的原子钟精确度很高，在3,000年期间也不会慢掉一秒钟。
One such atomic clock is so accurate that it will probably lose no more than a second in 3,000 years.
采用耦合一维双温模型的分子动力学方法，从连续及原子级的角度详尽描述了飞秒激光与金属的相互作用过程。
Using molecular dynamics method combining with two-temperature model, the progress of femtosecond laser-metal interaction is described completely at both continuum and atomistic length scales.
国际上对秒的定义就是根据当一个铯原子的电子改变能级的时候有多少振动发生。
And the international definition of the second is based on exactly how many vibrations happen when a cesium atom's electron changes energy levels.
原子钟计时可以精确到百万分之一秒。
他们利用了一些精密仪器和技术，例如高精度全球定位系统和原子钟，将测量的中微子运动距离精确至20厘米，运动时间精确至10纳秒(1纳秒即十亿分之一秒)。
They use fancy kit like high-precision GPS and atomic clocks to measure the distance the neutrinos travel to within 20cm and their time of flight to within ten nanoseconds (billionths of a second).
官方民用时间是由NIST - F 1铯原子钟记录，其准确度在每1亿年一秒的范围内。
Official civilian time is kept by the cesium NIST-F1 fountain clock, accurate to within one second every 100 million years.
官方民用时间是由NIST - F 1铯原子钟记录，其准确度在每1亿年一秒的范围内。
Official civilian time is kept by the cesium NIST-F1 fountain clock, accurate to within one second every 100 million years.
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