preying

This problem has been preying on my mind all day.

这个问题让伤了整整一天脑筋。

This matter has been preying on my mind all day.

这个问题整天萦绕。

The death of his father is really preying on his mind at the moment. He thinks it was his fault.

，父亲死成为他一块病，他认为那是自己过错。