学会放松用英语可以说成 learn to relax。

这个短语的来源可能源于人们通常认为放松是一种技能，需要学习和练习才能掌握。

例句：

It's important to learn to relax in order to reduce stress and improve your overall well-being.

(学会放松对于减轻压力和提高整体幸福感非常重要。)

I've been trying to learn to relax more, but it's hard for me to quiet my mind.

(我一直在努力学会放松，但很难让我的思维安静下来。)