1. His decision to invest all his savings in that risky business venture was an example of unwisdom.
他决定把所有的积蓄都投入到那个风险投资项目中，这是一个愚蠢的决定。
2. Showing unwisdom, she ignored the advice of experienced professionals and went ahead with her flawed plan.
她不明智地忽视了有经验的专业人士的建议，坚持了她有缺陷的计划。