求一段英语短语 忘了是谁讲的了 反正里面都是i know you know known什么的 很多know和known 求出处~
问题描述：
求一段英语短语 忘了是谁讲的了 反正里面都是i know you know known什么的 很多know和known 求出处~
答
The UnknownAs we know,There are known knowns.There are things we know we know.We also know There are known unknowns.That is to say We know there are some things We do not know.But there are also unkno...