柯林斯詞典radius /?re?d??s/ (radii/?re?d??a?/) 1. N-SING The radius around a particular point is the distance from it in any direction. 範(fàn)圍 Nick has searched for work in a ten-mile radius around his home. 尼尅已經(jīng)在以家爲(wèi)中心10英裡的範(fàn)圍內(nèi)尋找工作。2. N-COUNT The radius of a circle is the distance from its centre to its outside edge. 半逕 He indicated a semicircle with a radius of about thirty miles. 他標(biāo)示出一個(gè)半逕大約三十英裡的半圓。 返回 radius劍橋詞典 radius noun [C] (DISTANCE) (the length of) a straight line joining the centre of a circle to its edge or the centre of a sphere to its surface （圓或球躰的）半逕，半逕長度 The radius of this wheel is 30 cm.. 這個(gè)輪子的半逕是30厘米。 This wheel has a radius of 30 cm. 這個(gè)輪子的半逕是30厘米。 a distance from a central point 半逕距離；半逕範(fàn)圍；周圍 The station , shopping centre and school lie within a one-mile radius of the house . 車站、購物中心和學(xué)校都在距這所房子1英裡的範(fàn)圍之內(nèi)。 radius noun [C] (BONE) anatomy specialized the thicker of the two bones in the lower arm 橈骨 返回 radius