Each proton (or neutron) has about two thousand times the mass of an electron.

每一个中子或者质子的质量都是一个电子的两千倍。

youdao

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.

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。

youdao

It means that our measurement of the antiproton's mass relative to the electron is now almost as accurate as that of the proton.

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。

youdao

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?

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？

麻省理工公开课 - 固态化学导论课程节选

Roughly equal in mass to that of the proton.

大概等于质子的质量。

麻省理工公开课 - 固态化学导论课程节选

If you look at the electrical force, the force of electricity, proton and electron or something, it's not proportional to the mass of either object.

如果你考察电作用力,即电现象产生的力,质子啊,电子啊,或者其它什么东西,这种力不和物体的质量成比例

耶鲁公开课 - 基础物理课程节选

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Before July 4, 2012, the Higgs boson mass could only be in the 122 GeV to 130 GeV mass range (units where the proton mass is about 1 GeV, and the W and Z vector bosons are 80 GeV and 90 GeV, respectively).

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