And the third fact that we need to keep in mind is that spins remain parallel prior to adding a second electron in any of the orbitals.

第三个事实是我们需要记住在，每个轨道加入第二个电子之前，自旋保持平行。

youdao

And the third fact that we need to keep in mind is that spins remain parallel prior to adding a second electron in any of the orbitals.

第三个事实是我们需要记住在,每个轨道加入第二个电子之前,自旋保持平行。

麻省理工公开课 - 化学原理课程节选