rn meaning in English
Rn ＝ radon 【化学】氡。
Examples
let us suppose that with n objects and only wish to arrange a row of r of them. (r≤n). 我们考虑从几个元素中只取r个（rn）排列一行的情形。 - No . we assign only one rn number per company
不可以。一家公司只可以有一个rn代码。 - Multi - solution of semilinear elliptic equation on rn
全空间上半线性椭圆方程的多解性 - Rn or lpn administers medication to patient
正职护士或lpn对病患的药物管理 - How long does it take to get an rn number
多长时间就可以得到rn代码？