I think what we call external variables is very interesting.

我想我们怎么称呼外部变量是件很有趣的事。

youdao

You can put safeguards in place with external variables, but that would get messy very quickly.

可以利用外部变量采取安全措施，但这会很快引起混乱。

youdao

External variables allowing business process variables to be visible and directly manipulated outside process instance.

外部变量允许业务过程变量可见，并可以直接在过程实例之外操作。

youdao

So this isn't the most useful form that we can have, but what we'll see shortly is that from this, we can then derive further criteria for essentially any set of variables or any set of external constraints, like constant temperature or pressure or volume and so forth that we might set.

所以这不是我们所能得到的最有用的形式，但是我们会很快看到，我们能够进一步推导出包含任意变量,或者任意约束的自发过程判断标准，比如说恒定的温度，压强,体积或者其他我们能够给出的约束。

麻省理工公开课 - 热力学与动力学课程节选