Peripheral testing measures only one part of the body.

VOA: special.2010.08.31

Place the non-bonding pairs on peripheral atoms first, which the higher average valence electron energy.

首先将孤对电子放在外围的原子，那儿具有较高的平均价电子能。

麻省理工公开课 - 固态化学导论课程节选