So this is a little bit negative and this is a little bit positive, which means I could model this by drawing a dipole. This is a dipole.

这边带一点负电,这边带一点正电，这意味着我能把它表示,成一个偶极。

麻省理工公开课 - 固态化学导论课程节选

Positive psychology essentially focuses on the health model, Salutogenesis.

积极心理学本质上就是健康模型，健康本源学。

哈佛公开课 - 幸福课课程节选

The positive psychological model is slightly different.

积极心理学模型略有不同。

哈佛公开课 - 幸福课课程节选