But the presence of the dog there is a conditioned stimulus and so you grew to be afraid of dogs.

而这时狗的存在就变成了条件刺激,所以你开始对狗心生恐惧。

耶鲁公开课 - 心理学导论课程节选

and then I felt more comfortable to go into the city and be not afraid.

然后我感到更舒服，不再害怕走进这座城市。

对纽约的印象 - SpeakingMax英语口语达人

We are afraid of other things too but those are big things to be afraid of.

我们也害怕其他东西,但这些是我们最害怕的。

耶鲁公开课 - 心理学导论课程节选

It's got reason to be afraid.

它有理由恐惧

耶鲁公开课 - 死亡课程节选

and not be afraid to, uh, to be wrong sometimes.

而且不能害怕犯错。

想学好英语吗？ - SpeakingMax英语口语达人

Don't be afraid to spend money on it.

所以不要吝啬在这方面花钱。

准备LSAT的时候 - SpeakingMax英语口语达人