n.半徑范圍；半徑；橈骨；輻射區(qū)

Nobody is allowed to enter the operation radius. 不允許任何人進(jìn)入工作半徑范圍以內(nèi)。

What is the radius of this circle? 這個圓的半徑有多長?

We can compute the circular area with radius. 我們能用半徑計算出圓的面積。

The radius expands markedly at its lower end. 橈骨下端明顯擴(kuò)張。