令人发指的英文：
[Literal Meaning]
make/people/hair/stand on end
to make one's hair stand up in anger

[解释]
发指：头发竖起来，形容极为愤怒。使人头发都竖起来了。

[Explanation]
to make people very angry

[例子]
动物园饿死动物的事情真令人发指，他已经决定给联合国写信唤起他们的关注。

[Example]
That animals starved to death in the zoo was really inhuman and he decided to write to the UN to arouse their concern.

[英文等价词]
to get one's hackles up; to make one's blood boil

And to not be overly delighted by the mundane is appalling. It’s horrific. And, Dude, that’s heinous.
而对寻常事物若不是感到特别高兴就成了骇人听闻。“太恐怖了”。“啊，令人发指”。

Make one bristle with anger
令人发指

Abominable treatment of prisoners
对犯人进行令人发指的虐待

His bestiality made people bristle with anger.
他的禽兽行为令人发指。

The act of violence made people boil with anger.
这种强暴的行为令人发指。

Only an insane person could perpetrate such a horrible crime.
只有疯子才犯这种令人发指的罪行。

This massacre is one of the towering obscenities of other time.
这次大屠杀是当今最令人发指的事件之一。

The President described the killings as an abominable crime.
总统称这些血案为令人发指的罪行。

It was obscene to spend millions producing unwanted food.
耗资数百万去生产一些不需要的食品，真是令人发指。

Lately a vexing problem had grown infuriatingly worse
最近发生了一个讨厌的问题，而且严重到令人发指的地步。