He overreached himself and lost much of his fortune.他胆大无谋, 结果把大部分财产都搭进去了。

The company had overreached itself and made unwise investments.这家公司不自量力地轻率投资。

'It isn't wise to be too clever,' I said. 'Sometimes you overreach yourself.'“太过聪明并不好, ”我说, “有时候聪明反被聪明误。”