请输入您需要翻译的文本！There are known known,there are known unknown,and there are unknown unknown.的翻译：There are known known,there are known unknown,and there are unknown unknown. 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

有已知的已知，有已知的未知，有未知的未知。

There are known known,there are known unknown,and there are unknown unknown.

There are known known, there are known unknown, and there are unknown unknown.

正在翻译，请等待...

There are known known,there are known unknown,and there are unknown unknown.