"on the brain" in Chinese (Simplified)
总在脑子里总想着
Definition
当你对某事“on the brain”时，就是一直在想它，通常因为你对此特别感兴趣或着迷。
Usage Notes (Chinese (Simplified))
属于非正式表达，常用在“have”或“got”后。表示对某事非常感兴趣或念念不忘，不能用于医学上的“脑部”问题。
Examples
Lately, I've had soccer on the brain.
最近我总是把足球**放在脑子里**。
She has exams on the brain and can't relax.
她一直把考试**放在脑子里**，不能放松。
If you have chocolate on the brain, it's hard to eat healthy food.
如果你一直想着巧克力，很难吃健康的食物。
He can't stop talking about his new car—he's got it on the brain.
他不停地说他的新车——真的**总挂在脑子里**。
I’ve had that song on the brain all week. It won’t go away!
这首歌我**整周都在脑子里**，怎么都忘不掉！
Why are you so quiet? Got something on the brain?
你怎么这么安静？是不是有什么事**放在脑子里**？