This was their mother at her worst. Her voice was strident, she was ready to be angry at anyone.

这是他们的母亲最糟糕的情形。她声音刺耳，随时会对人发脾气。

《柯林斯英汉双解大词典》

They'll all be angry at me.

他们都生我的气。

youdao

Don't be angry at me for long and don't lock me up as punishment .

你不要时常对我生气和不要禁闭我来惩罚我。

youdao

Yet,even though you may be angry, I would know that at heart, you are a kind person.

VOA: special.2010.07.11

Like I'm angry at you but maybe that's forbidden for some reason, so I'll be angry at her.

比如，我在生你的气,但是可能由于某种原因我无法向你发脾气，所以我就迁怒到她身上。

耶鲁公开课 - 心理学导论课程节选

My first impulse was to be angry at MIT, where I went to college.

FORBES: Does Making Aaron Swartz A Martyr Endanger Other Suicidal People?

If anyone is looking for a reason to be angry at Canadian Prime Minister Stephen Harper, here it is.

FORBES: The Toronto G20: A Bad Idea

If you want something to be angry about, be angry at the arbitrary nature of federal ERISA and COBRA laws.

FORBES: Health Insurer Drops Cancer Suffering Vet- Two Cents Short On Premium Payment