| 单词 | radius |
| 释义 | radius 1 | radius 2 | radius 3 | radius 4 | [TOP]radiusra·dius / ˈreidiəs / noun (pl. 1. a straight line between the centre of a circle and any point on its outer edge; the length of this line 半径(长度) ⇨ compare diameter (1) 2. a round area that covers the distance mentioned from a central point 半径范围；周围: They deliver to within a 5-mile radius of the store. 他们在距离商场 5 英里的范围内送货上门。 3. (anatomy 解) the shorter bone of the two bones in the lower part of the arm between the elbow and the wrist, on the same side as the thumb 桡骨 ⇨ see also ulna [TOP]radius ra·di·us / ˈredɪəs ; ˈreɪdiəs / noun (plural radii) / -dɪˌaɪ ; -diaɪ / [C] 1. the distance from the centre to the edge of a circle, or a line drawn from the centre to the edge 〔圆的〕半径; ⇨ diameter 2. an area that covers a particular distance in all directions from a central point 半径范围; 周围: The shock of the explosion was felt over a radius of forty miles. 爆炸引起的剧烈震动在方圆 40 英里内都能感觉得到。 within a 10-mile / 200-metre etc radius There are more than a dozen golf courses within a 15-mile radius of St Andrews. 圣安德鲁斯方圆 15 英里之内起码有 12 个高尔夫球场。 3. [technical] the outer bone of the lower part of your arm 桡骨 [TOP]radius ['reɪ.di.əs] (plural radii) noun countable DISTANCE 长度 » (the length of) a straight line joining the centre of a circle to its edge or the centre of a sphere to its surface （圆或球体的）半径，半径长度 The radius of this wheel is 30 cm. 这个轮子的半径是30厘米。 This wheel has a radius of 30 cm. 这个轮子的半径是30厘米。 » a distance 半径距离；半径范围；周围 The station, shopping centre and school lie within a one-mile radius of the house. 车站、购物中心和学校都在距这所房子一英里的范围之内。 ['reɪ.di.əs] (plural radii) noun countable BONE 骨 specialized » the thicker of the two bones in the lower arm 桡骨 [TOP]radius ●○○○○ 1.N-SING 单数名词 半径范围；半径距离 The radius around a particular point is the distance from it in any direction. 【搭配模式】：with supp
2.N-COUNT 可数名词 半径 The radius of a circle is the distance from its centre to its outside edge.
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