And Walras said, "Well, it has to clear.

瓦尔拉说现在市场要出清了
The last market we don't need to worry about."

我们没必要担心最后一个市场
Why is that?

为什么呢
Because if X^(A) X^(B) = E^(A) E^(B) that means collectively

因为如果X^(A)+X^(B) = E^(A)+E^(B)
all the agents are spending on good X exactly all the money

那就证明所有代理商花在X上的钱
that they're collectively getting by selling good X.

就是他们卖掉X所赚的钱
That's what the top equation says because when you multiply

这就是第一个式子要表达的因为
through the whole thing by P_X the total amount

你把有关P_X的东西相乘人们花在
people are spending on good X is equal to the total amount agents

商品X上的钱与代理商们
are getting by selling all the good X.

卖掉X所赚的钱相等
So since everybody's spending all their money that must mean

所以既然所有人都花光了他们所有的钱
the rest of their money collectively is just all their

那就意味着他们所剩的钱