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.
电子的质量是氢原子质量的1850分之一。
他大胆地认为空穴的质量就是和电子的质量相同。
He said boldly that the holes had to have the same mass as the electrons.
它指电子的质量。
例如，质子的质量比电子的质量重1836倍。
The mass of proton, e. g. , is 1836 times heavier than the electron mass .
例如，质子的质量比电子的质量重1836倍。
The mass of proton , e. g. , is 1836 times heavier than the electron mass .
我们不能得到电子的质量，因为它们相较起来太轻了。
And we don't put the mass of the electrons because they are so light in comparison.
和光速或电子的质量不同的是，人类的脑力并不是恒定不变的。
Unlike the speed of light or the mass of the electron, human brain power is not an eternally fixed constant.
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.
与电子的质量相等但带正电荷的亚原子粒子(是电子的反粒子)。
A subatomic particle with the same mass as the electron but positive charge (it is the antiparticle 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.
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.
我的意思是，原子的质量也很小，但是我们说的是，和整个原子质量相比，电子的质量是很小的。
I mean, the atom has a tiny mass, too, but what we are saying is compared to the totaled atomic mass, the mass of the electron is tiny.
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.
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.
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.
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.
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.
但是它的质量是电子的1800倍。
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.
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.
研究者发掘出生成更高质量的晶状半导体精密方法，以减少电子或者正电穴由于杂质而受阻的可能性。
Researchers developed sophisticated methods to grow high-quality semiconductor crystals, reducing the likelihood that electrons or holes will become trapped by defects.
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.
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.
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.
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.
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.
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.
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.
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