A phobia, after all, is an irrational fear.

恐惧症说到底是一种非理性的恐惧。

I thought it was a somewhat irrational fear.

我想这可能有点非理性地过虑了。

I have a irrational fear of the loud voice of my mother.

我对母亲的大声说话有种莫名的恐慌。

Ebolaphobia is a strong and irrational fear of the Ebola virus.

“埃博拉恐慌”指对埃博拉病毒的一种强烈的非理性恐惧。

Irrational fear is the source of prejudices, phobias and knee-jerk reactions.

非理性的恐惧是偏见和恐惧症的根源，膝跳反射也是因此而发生。 下面这些都是非理性的恐惧。