But weirdly, hardy anyone had scientifically investigated this, until a truly extraordinary person I got to know, named professor Tim Kasser, who's at Knox College in Illinois, and he's been researching this for about 30 years now.

但奇怪的是， 任何人都对此进行了科学调查，直到我认识了一个真正非凡的人， 名叫蒂姆·卡瑟教授， 他在伊利诺伊州的诺克斯学院，他已经研究这个大约30年了。