•If you think you can carry on drinking so much without damaging your health, then you're mistaken.如果你认为可以继续喝这么多酒而不损害健康的话，那你错了。

•I'm afraid I was mistaken about how much it would cost.恐怕我搞错了要花多少钱。

•The negotiations continued in the mistaken belief that a peaceful agreement could be reached.人们都误以为可以达成和平协定，谈判就在这个背景下继续进行着。

•a case of mistaken identity认错人的案例