And Born worked on a number of things, including the Born exponent, and taught himself crystallography sort of as something to do during World War I.

玻恩也做出了许多贡献，包括玻恩指数，他自学结晶学,这大约是在一战期间。

麻省理工公开课 - 固态化学导论课程节选

And that is how come he got involved in this, obviously this is talking about crystal formation.

这也是为什么他会出现在这里，结晶学就是研究晶体的形成。

麻省理工公开课 - 固态化学导论课程节选