adjective [原级]已知的，已发现的；知名的，出了名的
You use known to describe someone or something that is clearly recognized by or familiar to all people or to a particular group of people.
众所周知的; 公认的
verb [vt. 及物动词]知道（know 的过去分词形式）
If you let it be known that something is the case, or you let something be known, you make sure that people know it or can find out about it.
明确表示
单词造句: