have got something on the brain

• 专心贯注于(某事)；热中于(某事)；迷上了(某事)；念念不忘某事

have got something on the brain的用法和样例：

例句

1. They are intent on Buying into this Business.
   他们热中于买进这个事业。
2. We went on a mystery-reading kick.
   有些人热中于保健食品。