If I'm working under conditions of constant temperature and volume, that's very useful.

如果在恒定的温度和体积下,进行一个过程，这是非常方便的。

麻省理工公开课 - 热力学与动力学课程节选

We discovered that the quantity dA, under conditions of constant volume and temperature, dA TS And A is u minus TS.

我们发现在恒定的体积和温度下，亥姆赫兹自由能的变化，小于零，is，less，than，zero。,亥姆赫兹自由能A等于内能u减去。

麻省理工公开课 - 热力学与动力学课程节选

We need to have conditions internally that are relatively constant in terms of temperature, and pH, and chemical composition in order for us to thrive.

我们需要体内的环境参数保持相对稳定,这些环境参数包括,温度,pH值,以及化学组成,这样人才能茁壮成长

耶鲁公开课 - 生物医学工程探索课程节选