I think I labeled this one two, 3 ionization I labeled three, 4 electron affinity I labeled four 5 and crystallization I labeled five.

这一步为步骤，离子化为步骤，电子亲合为步骤,结晶为步骤。

麻省理工公开课 - 固态化学导论课程节选

You can think of electron affinity as sort of the ionization in reverse of the ion.

电子亲合,是离子化的逆过程。

麻省理工公开课 - 固态化学导论课程节选

So this reaction is called electron affinity.

整个这个反应称为电子亲合。

麻省理工公开课 - 固态化学导论课程节选