“笑是欢乐，是积极地参与生活，”鲍林格林大学（Bowling GreenUniversity）心理学教授亚普·潘克斯普（JaakPanksepp）说。

"It's joy, it's positive engagement with life, " said Jaak Panksepp, a Bowling Green University psychology professor.

youdao

“笑是欢乐，是积极地参与生活，”鲍林格林大学（Bowling GreenUniversity）心理学教授亚普·潘克斯普（JaakPanksepp）说。

"It's joy, it's positive engagement with life, " said Jaak Panksepp, a Bowling Green University psychology professor.

youdao