有什么可知的英语怎么说

"What is known" 英文可以说成 "what is known" 或者 "what is known to be true." 这个表达方式来源于英语的常用语法结构，在这里，"known" 是一个形容词，修饰后面的名词 "what"。
下面是一些例句：
What is known about the cause of the fire is that it started in the kitchen. (已知的火灾原因是它是在厨房开始的。)
What is known about the new virus is that it is highly contagious. (已知的新冠病毒是它传染性很强。)
What is known about the ancient civilization is that they were skilled in agriculture and metalworking. (已知的古代文明是他们在农业和金属加工方面很有技巧。)