She has mistaken me. 她误会我了
He mistook me for my brother. 他把我错看成我哥哥[弟弟]
There is no mistaking him [his real motive]. 他不会被认错[他的真实动机一目了然]
mistake one's man 看错对方,把对方估计过低.

There is no mistake about that. 那是确实无误的
Now no mistake. 别弄错我的意思(好好听我说)
beyond mistake 确实地,毫无疑问地 (undoubtedly)
make a mistake 犯错误
He who makes no mistakes makes nothing. 【谚】 不犯错误办不成事.
Wise men learn by other men's mistakes; fools by their own. 【谚】 智者从他人的错误中吸取教训,愚者从自己的错误中吸取教训
Make no mistake, it's got to be done. 毫无疑问,它要完蛋的.