生气的情绪消散的英文表达有两种：

Dissipate one's anger: 消散生气，这个表达来自于动词dissipate，意思是使（某物）消散、消失。

例句：

It's important to find ways to dissipate your anger before it boils over. (重要的是找到方法在生气爆发前消散它。)

Exercise can help dissipate anger and stress. (锻炼可以帮助消散生气和压力。)

Subside one's anger: 抑制生气，这个表达来自于动词subside，意思是使（某事物）平息、减弱。

例句：

It took him a while to subside his anger after the argument. (他花了一会儿时间在争论后抑制他的生气。)

She tried to calm herself down and let her anger subside. (她试着让自己冷静下来，让她的生气平息。)