known
/nəʊn/adjective
1- recognized, familiar, or within the scope of knowledge已知的, 熟悉的, 认识的：
plants little known to western science
西方科学了解甚少的植物
the known world.
已知世界。
1.1
- attrib. publicly acknowledged to be公认的：
a known criminal.
公认的罪犯。
1.2
- Mathematics (of a quantity or variable) having a value that can be stated【数】（数量, 变量）已知的。