on one's mind [ɔn wʌnz maind]

以下由轻松背单词网站提供

压在心头

It's been weighing on my mind for days whether to tell her or not.我这几天心烦意乱，不知道应该不应告诉她。
This matter has been preying on my mind all day.这个问题整天萦绕在我的心头。