I went back and studied this boom rather extensively by --there's one book written about it.

我追溯且彻底研究了这段繁荣,有一本描写此内容的书

耶鲁公开课 - 金融市场课程节选

I think, a collection of epic poems written in Sanskrit that goes back-- it was actually written over a course of 1,000 years and it was completed in the fourth century.

这是本用梵文编著的史诗作品集,可以追溯到...,事实上这本作品的创作时间历时近千年,最终完稿于公元四世纪

耶鲁公开课 - 金融市场课程节选