in your element
处于熟悉或舒适状态；在自己最擅长的领域中
口语·表达某人做擅长事时的舒适状态
英文释义
to be in a situation or environment where one is comfortable or confident
例句
She's a natural teacher; put her in front of a class and she's in her element.
典故来源
源自炼金术和古希腊哲学中的‘元素’概念，指人处于最适合自己的环境时，就像元素回归本位一样自然和谐。