这只是牛顿学上关于动量的表达，用电子质量，乘以瞬时速度。
And this is just a Newtonian expression of momentum, the product of the mass of the electron times its instant velocity.
这一理论预测了反物质的存在，反物质与电子质量相同，电荷相反。
It predicted the existence of an anti-matter with the same mass as the electron but with an opposite charge.
为什么电子比质子或中子活动更大？这是因为电子质量轻，结合力弱的缘故。
Why are electrons more mobile than protons or neutrons? It is BE cause they have lighter mass and less firm binding.
结果表明：真空作用导致的电子质量和电荷的改变量都很小，分别为0.3%、0.026%。
The results indicate that these two changes are both very small respectively with number value 0.3% and 0.026%.
用电子质量代替折合质量去计算氢原子基态能量给出- 13606电子伏，误差是13000分之7。
Use of electron mass instead of the reduced mass to calculate the ground-state energy of the hydrogen atom gives-13606ev which is in error by7parts in13000.
如果是原子质量一定，而电子很小，那么带正电荷的部分几乎占据了全部质量。
If the atom is fixed mass, and the electron is tiny, it must be the positives have all the mass.
每一个中子或者质子的质量都是一个电子的两千倍。
Each proton (or neutron) has about two thousand times the mass of an electron.
关于这些限制，并没有很简单的解决方法，但是通过使用电子邮件的自动处理、并更新您的列表，您可以提高白名单和黑名单的质量。
There is no simple way round these limitations, but you can work to improve the quality of your whitelists and blacklists by using auto-processing of your e-mails and updating of your lists.
在1911年之前，科学家认为电子带有电荷以及质量，但没有人很确认原子是怎样组成的。
By 1911, scientists had already measured the charge and mass of an electron. But no one was sure how the atom was structured.
外尔只是发表了一篇粗糙的陈述，声明空穴必须具有与电子相同的质量，而没有对这份断言作出任何具有物理含义的评论。
Weyl just published a blunt statement that the holes must have the same mass as the electrons and did not make any comments on the physical implications of this assertion.
曾经一度和廉价和不禁用的“日本制造”电器最终在质量方面领先全球，使得美国的电子产业一路蒙羞。
"Made in Japan" gadgets, once cheap and flaky, ended up as world leaders in quality, humiliating America's electronics industry along the way.
最终，您还应该确保您的电子邮件系统和垃圾邮件过滤解决方案拥有合适的信息和高质量的信息，以使得它们能够有效地对垃圾邮件进行过滤。
Ultimately, you want to make sure that your e-mail system and the spam filtering solution have the right information and the right quality of information to enable them to filter the spam effectively.
就象今天的消费电子行业，这个系统整体将与标准连接，以确保质量并降低成本。
Like today's consumer electronics industry, the system as a whole will be connected with standards to ensure quality and drive down prices.
这意味着，现在我们对反质子对电子的质量测量精度几乎与测量正质子一样。
It means that our measurement of the antiproton's mass relative to the electron is now almost as accurate as that of the proton.
但是它的质量是电子的1800倍。
他接受了外尔关于空穴质量与电子相同的结论并面对着这个空穴并没有在现实中观测到这个物理现实。
Oppenheimer accepted Weyl's conclusion that the holes had to have the same mass as the electrons and faced the physical reality that the holes were not observed in practice.
而且我认为人们也会开始考虑，像电子的质量对质子的质量的比值，也许其他无量纲的常数也在发生变化。
And I think people would start looking to see, well, maybe other dimensionless ratios like the ratio of the mass of the electron to the mass of the proton are changing.
如果做法正确无误，数字电视运营商甚至能使最老式的模拟电视机出来的图像更清晰——没有重影和别的电子噪声，来损害模拟广播电视质量。
Done correctly, digital broadcasting can make images sharper on even the oldest of analogue sets-with none of the "ghosting" and other electronic noise that marred analogue broadcasting.
如果是原子质量一定，电子很小，带正电荷的部分几乎占据了全部质量。
If the atom is fixed mass, the electron is tiny, it must be the positives have all the mass.
原子中的电子数,将近是原子质量的一般。
The number of electrons in an atom is deduced to be approximately equal to half the atomic weight.
如果一个没质量的光子能像粒子一样，具有质量的电子能否，表现得像波一样吗？
If a proton which has no mass can behave as a particle does it follow that an electron which has mass can behave as a wave?
到目前为止，大型强子对撞机将质子-反质子对撞机设置的质量限制扩大了两倍，以高达约700千兆电子伏的能量规模高速运作也未能找到任何超夸克的存在。
So far the LHC has doubled the mass limit set by the Tevatron, showing no evidence of squarks at energies up to about 700 gigaelectronvolts.
普朗克常量的平方,乘以π再乘电子的质量。
Square of the Planck constant times pi mass of the electron.
如果你仔细找的话，会找到e表示的元电荷，也能找到电子的质量。
If you look up really close, there is the elementary charge e.There is the mass of the electron.
两项最新伽马射线天空图的观测研究表明如果此种神秘物质是粒子，则要大约是一个质子质量的44倍，比400亿电子伏还重。
Two new looks at the gamma-ray sky suggest that if the mysterious matter is a particle, it is heavier than 40 gigaelectronvolts, about 44 times the mass of a proton.
这就解释了为什么我们不担心，原子核运动起来，因为原子核和电子的质量比约为2000 ？
That is why we don't worry about the motion of the nucleus 1 because the ratio of mass is about 2,000 to one.
那些带有正电荷且质量与电子相等的粒子存在的证据就在他们眼前，但他们却没能对他们所见到的东西有所鉴别。
They had the evidence before their eyes for these new particles with positive charge and the same mass as the electrons, but they were just unable to appreciate what they saw.
从我发现这个想法的一开始，我就觉得这意味着空穴和电子之间具有对称性，因此这个空穴具有与电子相同的质量。
From the beginning when I had this idea, it seemed to me that there would be symmetry between the holes and the electrons and therefore the holes must have the same mass as the electrons.
而这是一个很大的困扰，因为质子的质量与电子相距甚远。
And that was a great worry because the protons have a very different mass from the electrons.
了解更多关于人类鼻子的工作原理，他说，将有助于研究人员更好地开发可以评估食品质量，甚至嗅出爆炸物的电子鼻。
Knowing more about how our noses really work, he says, will help researchers better develop electronic noses that can assess food quality and even sniff out explosives.
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