So in molecular orbital theory, what we did was we named orbitals based on their symmetry.

在分子轨道理论中，我们基于轨道的对称性给它们命名。

麻省理工公开课 - 化学原理课程节选

So the way that you describe a bond is you describe the orbitals that the bond comes from, and also the symmetry of the bond.

描述一个键的办法,是描述形成键的轨道，以及键的对称性。

麻省理工公开课 - 化学原理课程节选