这是二元函数中的第一个例子。

That was our first example of a function of two variables possibly.

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我们将把注意力集中在二元函数上。

So, we are going to focus on the case of functions of two variables.

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还有另外的一种方法画出二元函数的图像。

So, there is another way to plot the functions of two variables.

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这的确是一个二元函数。

Oh, a function of two variables.

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因此当我们在想像一个图像时，其实那只是一个二元函数的图像。

So, when we think of a graph, really, it is a function of two variables.

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二元函数的极限远比一元函数的极限复杂，但它们之间又有密切的联系。

Limit of function of two variables is more complex than that of one variable.

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由配分函数求出二元系统的物态方程。

Then the equation of state for binary system is developed.

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由配分函数求出二元系统的物态方程。

Then the equation of state for binary system is developed.

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