They're everywhere in cells throughout your body and they are responsible for lots of the biochemistry of cell/cell interaction and signaling.

它们在身体各处的细胞中都有,并负责很多细胞间的相互作用,及信号转导的生化过程

耶鲁公开课 - 生物医学工程探索课程节选

A positive emotion can come in form of watching a humorous film; " it can come in form of "if you take a deep breath"-- we talked about deep breathing when we talked about my body; a positive emotion can come in form of interaction with a friend, a pleasant one.

积极情绪可以是看一部滑稽电影;,可以是“一次深呼吸-,探讨“心理，身体“时会谈到深呼吸;,积极情绪可以是与朋友交流，一次愉快的交流。

哈佛公开课 - 幸福课课程节选