Now annuities also can be changed in two important ways.

年金有两种重要的分类
They can be indexed to inflation.

有修正通货膨胀的
That's a much better annuity because now you're protected against inflation.

这种年金更加好因为免受通胀影响
It also could be timed to last the rest of your life.

年金也能在你后半生中一直支付
So we're going to come to this when we talk about Social Security.

讲到社会保障的时候我们会讲这一点
The most important annuity by far in the whole economy

到现在为止在经济中最重要的年金
is the Social Security annuity.

是社会保障年金
Once you retire and you're in Social Security

你退休之后就会进入社保体系
they figure out what your coupon is going to be every year.

他们计算你每年拿到的养老金是多少
I'll tell you the formula in a couple of classes.

以后课上我告诉你计算公式
So depending on how much you've contributed

依据你贡献的多少
they calculate what your coupon is every year.

他们计算你每年拿到的养老金是多少