There's hardly any vapor pressure above your ice water glass.

冰水混合物上方,水蒸气的气压非常小。

麻省理工公开课 - 热力学与动力学课程节选

So a closed system would be, for instance, a glass of ice water with an ice cube in it, with the lid on top.

因此闭系可以是，比如说，一杯放了,一个冰块的冰水，顶上加了盖子。

麻省理工公开课 - 热力学与动力学课程节选

You take a glass of ice water and set it down.

这是液态；

麻省理工公开课 - 热力学与动力学课程节选

It could be a glass of water with ice in it.

它可以是一杯有冰块的水。

麻省理工公开课 - 热力学与动力学课程节选

You need to know if it's an equilibrium, and you also need to know how many components you have in your system So, a glass of ice water with an ice cube in it, which is a heterogeneous system, has only one component, which is water, H2O.

要知道它是不是平衡的，你还需要知道,你的系统中有多少组分,一杯放了冰块的水，虽然它是个非均匀系统，但它只有一种组分，那就是水。

麻省理工公开课 - 热力学与动力学课程节选