Many kinds of molecules make up your coffee There are the water molecules, the flavor molecules the milk proteins, etcetera.

许多不同种类的分子构成了你的咖啡,有水分子，气味分子，牛奶蛋白等等。

麻省理工公开课 - 热力学与动力学课程节选

Latte, which is a homogeneous system, has a very, very large number of components to it All the components that make up the milk.

拿铁咖啡是个均匀系统，但它有非常非常多的组分,牛奶中的所有组分咖啡中的所有组分。

麻省理工公开课 - 热力学与动力学课程节选

So coffee and the milk and whatever you like in your coffee would be the system.

么咖啡，牛奶以及任何你能想到的,在你的咖啡里的东西就是一个系统。

麻省理工公开课 - 热力学与动力学课程节选

You're going to have to know when you describe the system, if your system is homogeneous, like your coffee with milk in it, or heterogeneous like water with an ice cube in it So heterogeneous means that you've got different phases in your system.

你要知道,当你描述一个系统时，你的系统是均匀的呢，像掺了牛奶的咖啡，那样还是非均匀的，像放了冰块的水,非均匀系统就是说,在你的系统中有不同的相存在。

麻省理工公开课 - 热力学与动力学课程节选