He thinks there's one,

他认为只有一个
which in a way does go back to this question:

这在某种程度上又回到了这个问题
all right, what is the moral law? What does it tell us?

没错什么是道德法则它告诉了我们什么
So, what guarantees...

那是什么...
it sounds like to act autonomously

听上去好像自主行动
is to act according to one's conscience, according to a law one gives oneself,

是根据个人良心个体给自己制定的法则行动的
but what guarantees that we...

但什么保证我们
if we all exercise our reason,

如果我们实践的都是各自不同的理性
we will come up with one and the same moral law?

那我们会得出一个统一的道德法则吗
That's what Amady wants to know.

这就是阿玛蒂想要知道的
Here's Kant's answer:

康德的回答是
the reason that leads us to the law

将我们引向作为自主存在