translation.en: Contrary to what psychology told us about the bottom 50 percent of the human race in positive affectivity, I think Len is one of the happiest people I know.
translation.zh: 和心理学家关于人类积极情感较差的50%人群 相关研究成果恰恰相反 我觉得兰是我认识的最幸福的人之一