lepton epoch造句

例句与造句

1. The lepton epoch was the period in the evolution of the early Universe in which the leptons dominated the mass of the Universe.
2. After most leptons and anti-leptons are annihilated at the end of the lepton epoch the energy of the universe is dominated by photons.
3. During the lepton epoch the temperature of the Universe was still high enough to create lepton / anti-lepton pairs, so leptons and anti-leptons were in thermal equilibrium.
4. It's difficult to find lepton epoch in a sentence. 用lepton epoch造句挺难的