In this paper,several bond orders have been described again by means of separating, thus the source of bond orders and bonding can be analysed from MO and AO.

• 本文用分割的方法对几种键级进行了重新的描述,从而可从分子轨道(MO)和原子轨道(AO)的角度来分析键级的来源和成键情况。