Bernard Bilski and Rand Warsaw wanted to patent a method to let traders protect against the risk of price changes in energy markets.

VOA: special.2010.07.16

And we can actually better visualize this if we plot how that energy changes as a function of internuclear distance.

而我们就能更清楚地看到这些，如果我们画出,能量随核间距的变化曲线。

麻省理工公开课 - 化学原理课程节选

In other words, now I know how to tell how the Helmholtz free energy changes as a function of temperature.

换句话说，我现在知道如何写出亥姆赫兹,自由能作为温度的函数。

麻省理工公开课 - 热力学与动力学课程节选

Thiamine changes starchy foods into energy.

VOA: special.2009.04.21

And the energy changes, it goes up.

能量发生变化，增加了。

麻省理工公开课 - 热力学与动力学课程节选

And it's always going to come down to calculating the appropriate free energy, and how it changes in the process.

这总是涉及到计算,适当的自由能，以及这些自由能在过程中如何变化。

麻省理工公开课 - 热力学与动力学课程节选