never mind hers, it goes off the page,

不要看她的超出图标范围了
his budget set he starts with this endowment.

他的预算集从这个财产水平开始
If the prices are given px and py,

如果价格是px和py
px and py define a linear tradeoff between X_i and Y_i,

px和py描述了xi和yi的成比例交换
in this case j,

在j的例子中
because the more X you consume the less Y you have to consume

因为x消费的越多y就得消费的越少
and there's going to be a linear tradeoff between the two

通过重新安排这几个量
given by rearranging these terms.

x和y之间可以进行交换
px and py are fixed,

px和py是定值
so this is just a linear equation in xi and yi,

xi和yi之间是一个线性方程
and so that tradeoff is given by that budget set.

交易在这个预算集里进行
So mister pink is going to try, given his opportunities on this budget set,

粉色的这个人将在预算集的限制下