brood on

• vt. 郁闷地沉思(沮丧地苦想)

brood on的用法和样例：

例句

1. He brood on his failure.
   他思忖着他的失败。
2. It doesn't help to brood on your mistakes.
   对所犯的错误耿耿於怀是无济於事的。