If you're a serious chess player, you might study some of the great games of chess history.

如果你是一名严谨的棋手,你可能还会研究国际象棋史上最伟大的棋局

耶鲁公开课 - 死亡课程节选

You'll be introduced here to studies, to research, to rigorous academic work.

我将向你们介绍相关知识，调查研究，严谨的学术作品。

哈佛公开课 - 幸福课课程节选

This was serious study.

这是一项非常严谨的研究。

哈佛公开课 - 幸福课课程节选