This is discussed in detail in the textbook

这在教材中已有详细的叙述
but I also--I'm going to give you—

但我还是想给你们
Don't panic if you don't get it quite now.

如果一下子理解不了也不用担心
I'm going to give you further and further examples.

我会再多给你们举些例子
So, the idea here is,

这里的意思是说
repeated pairings of the unconditioned stimulus and the conditioned stimulus

无条件刺激与条件刺激的反复匹配
will give rise to the response.

会引起条件反应
And there's a difference between reinforced trials and unreinforced trials.

但强化尝试和非强化尝试是不一样的
A reinforced trial is when the conditioned stimulus

强化尝试是指条件刺激
and the unconditioned stimulus go together.

与无条件刺激同时出现的时候
You're--and to put it in a crude way,

简单地说
you're teaching the dog

你在让狗知道