You people have no sense of humor, no sense of joy, no sense of joie de vivre. You are so young.

你们这些人啊，没有幽默感，没有娱乐精神，也没有生活的乐趣，你们太年轻了。

麻省理工公开课 - 固态化学导论课程节选

How can we prevent problems like depression or substance abuse or schizophrenia in young people who are genetically vulnerable or who live in worlds ? that nurture these problems?

怎样才能预防像抑郁症这样的心理问题,或年轻人中常出现的药物滥用或精神分裂症,谁天生敏感脆弱，谁又是,制造这些问题的人？

哈佛公开课 - 幸福课课程节选