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

Plato was born in 427, which is four years after the commencement of the Peloponnesian War.

柏拉图生于公元前，427，年，即伯罗奔尼萨战争,开始之后的四年。

耶鲁公开课 - 政治哲学导论课程节选