来自《耶鲁大学开放课程：金融理论 第4集 第4集》
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Sorry, this is line zero.抱歉 这是第零条 -
This is just repeating what's the case.只是在重复我们的例子 -
W^ of X^-hat, Y^-hat greater thanW(X^,Y^)大于 -
That's for all I.都是对于I -
That's the claim.这是条件 -
Could this happen that you've got a feasible X^-hat, y^当你得到可行的X^和Y^组合 -
and it makes everybody better off than x^, y^.相比X和Y的组合 大家境况会改善么 -
Could this happen?事实会如此么 -
The answer's no.答案是不 -
Line one is, if that were true then it would证明第一行 如果这是正确的 -
have to be the case that P_X times X^-hat就会有P_x*X^ -
P_Y times Y^-hat had to be greater than加上P_y*Y^大于