known

a study of all the known facts.对所有已知事实的研究

her last known address.她最后一个为人所知的地址

Apart from vaccines, there is no known way to protect against meningitis..除了使用疫苗外，还未发现其他预防脑膜炎的方法。

known as,被认为是，被称为；以…而著称

well known,众所周知的；出名的

known for,因…而闻名

best known,最著名的

known about,知道关于……的事情

make known,表明，公布；报告；透露

should have known,本应该知道

as is well known,众所周知

as known to all,众所周知

known quantity,n. 熟知的人或事；已知量