判据指出，一切氧化物超导体的原子价层轨道平均能的平均值都在- 12。

The criterion shows that the average values of average energy of valence orbits of atom of all the oxide superconductors concentrate in a narrow range from -12.

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通过分析，我们发现了分子体系的价层轨道平均结合能与金属氧化物催化活性间的内在规律。

Inherent laws between the average binding energy of valence orbits of molecular systems and the catalytic activity of metal oxides are found by analysis.

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这种情况每年平均发生一两次，不是每月都发生，因为月球绕地球公转的轨道稍稍有点斜。

This happens about once or twice a year, on the average, but not each month since the Moon's orbit around the Earth is slightly tilted.

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So then, I could say that the average valence electron energy for oxygen would then be, I've got two s electrons.

所以，我可以说,氧的平均价电子能,就是，以我得到的两个s轨道的电子来算。

麻省理工公开课 - 固态化学导论课程节选