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

The second is that you may be angry at another person or object.

第二个是，你可能会反对另一个人或生气。

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。

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