You have equal numbers of donors and acceptors.

你有等量的电子给体和受体。

麻省理工公开课 - 固态化学导论课程节选

So, we end up here within an octave-- we end up with twelve equal pitches, but we still use this term a 'seven-note scale' because we have seven notes within the scale of the major scale and seven notes within the scale of the minor scale.

因此,我们在一个八度内,最终得到等量划分的十二个音高,但是我们始终称之为"七音音阶",因为在大调音阶上有七个音符,在小调音阶上也有七个

耶鲁公开课 - 聆听音乐课程节选

The electron completely canceled out 1 it's equivalent of charge from the nucleus, such that we only saw in a z effective of 1.

电子完全抵消了来自原子核的等量电荷,这样我们仅仅看到有效的z为，在极端案例b中。

麻省理工公开课 - 化学原理课程节选