米老鼠和他在华特迪士尼的老板们面临着另一个挑战：赢得这个国家正在发展壮大的中产阶级的心和思想。

Mickey Mouse and his bosses at Walt Disney face another challenge: to win the hearts and minds of the nation's booming middle class.

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游客们在观看由沙艺术家苏达山派特耐克创作的沙雕。

Visitors look at a sand sculpture created by sand artist Sudarshan Pattnaik.

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特温格和她的同事们想要了解为什么平均幸福感会发生这样的变化。

Twenge and her colleagues wanted to understand why this change in average wellbeing occurred.

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And what struck me most about conversations that I had, either in Leverett or other houses, were students is their sense of mission,your sense of mission, your desire to do good, to make the world a better place.

在与学生的交谈中，让我印象最深的是，无论是在莱弗里特宿舍或其他地方，学生们的使命感，你们的使命感，你们对成功的渴望，让世界变得更美好的愿望。

哈佛公开课 - 幸福课课程节选