I mean, why one year?

为什么是一年呢
Why not one month?

为什么不是一个月
Why not one day?

或者是一天呢
Nobody expects Yale to balance its budget every day.

没人会希望耶鲁每天都在平衡预算
Some expenditure comes in one day.

每天多少会有一些支出
They have to hire an electrician to fix something unexpected.

加入他么必须雇佣电工来解决意外问题
They're going to spend more money than they take in student tuition that day.

那天的花销甚至可能比那天收入的学费还多
So the fact that they're supposed to budget the balance

所以要让他们每天平衡预算
every year is just a fiction.

只能想想而已
Irving Fisher taught us that Yale really has--

欧文·费雪认为耶鲁实际上...
if you can borrow and lend and you don't have to worry about

如果借贷自如且不用担心风险
risk there's one infinite-lived budget set.

那么预算集将是无限的