"So for instance, our relationships have been linked to lower blood pressure, better immune functioning, and even inflammatory processes that are implicated in a number of diseases."

VOA: standard.2010.07.29

That is, most processes that we're concerned with, they'll happen with something held constant like pressure or temperature or maybe volume.

这句话是说我们所关注的大部分过程，发生的时候都是保持某个量为常数,比如压强，温度或者体积。

麻省理工公开课 - 热力学与动力学课程节选