单词 radius 释义 ▪ I. radius, n.|reds|Also 7 -ous. Pl. radii |reda|; also 7–8 radius's, 8 -uses.[a. L. radius a staff or stake, measuring-rod, spoke, ray, etc. (cf. senses below).]1. A staff, rod, bar, or other straight object. †a. The staff of a cros...
单词 radius 释义 radius n (pl -dii ) 1 (length of a) straight line from the centre of a circle or sphere to any point on its circumference or surface 半径(距离). =>App 5 见附录 5. =>illus at circle 见circle插图. 2 circular area measured by its radius 用...