| 释义 |
ra.di.us5reI7di7Esn [C]pl radii (the length of) a straight line joining the centre of a circle to its edge or the centre of a sphere to its surface半径，半径距离The radius of this wheel is 30 cm.This wheel has a radius of 30 cm.该轮子的半径是30厘米。(fig.) The station, shopping centre and school lie within a one-mile radius of the house (= are all less than a mile away from it).车站、购物中心和学校均位于离这屋子一英里的半径范围内。
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