Well, how can reason determine the will?

那么理性是怎样决定意志的
There are two ways and this leads to the third contrast.

有两种方式这也就引出了第三组相对概念
Kant says there are two different commands of reason

康德认为存在两种不同的理性律令
and a command of reason Kant calls an imperative,

康德将理性律令称之为命令
an imperative is simply an ought.

而命令就是应然
One kind of imperative, perhaps the most familiar kind,

其中一种命令或许是最为人所熟知的命令
is a hypothetical imperative.

就是假言命令
Hypothetical imperatives use instrumental reason.

假言命令运用的是工具理性
If you want x then do y.

如果你想要X 你就得做Y
It's means-ends reasoning.

这是手段-目的推理
If you want a good business reputation then don't shortchange your customers,

要想获得良好的商业信誉就不能少找顾客零钱
word may get out.

会有传言出去的