| 单词 | radius |
| 释义 | radius['reidiəs]n. 半径, 范围, 辐射光线【电】 半径 radius ra.di.us AHD: [r³“d¶-…s] D.J. [6re!di8*s]K.K. [6redi*s]n.（名词） 【复数】 ra.di.i[-d¶-º”] 或 ra.di.us.es 1. Abbr. R,r,rad.Mathematics 缩写 R,r,rad.【数学】 2. A line segment that joins the center of a circle with any point on its circumference.圆半径：将圆心与圆周上任一连接起来的线段3. A line segment that joins the center of a sphere with any point on its surface.球半径：将心与球面上任一点起来的线段4. A line segment that joins the center of a regular polygon with any of its vertices.将正多边形的中心与它的一任一顶点起的来的线段5. The length of any such line segment.半距离：这种线段的长度6. A circular area measured by a given radius:半径范围：以某一半径所计的圆形地区：every family within a radius of 25 miles of the city center.住在离城中心半径25英里的范围内的家庭7. A bounded range of effective activity or influence:活动半径：有效活动或影响的边界范围：the operating radius of a helicopter.直升飞机的作战半径8. A radial part or structure, such as a mechanically pivoted arm or the spoke of a wheel.辐射部分：辐射形的部件或结构，如机械上有轴的臂或车轮的辐条9. Anatomy 【解剖学】 10. A long, prismatic, slightly curved bone, the shorter and thicker of the two forearm bones, located on the lateral side of the ulna.桡骨：一种长的、棱柱状、微弯的内头，两根前臂骨中较短较粗的一根，位于尺骨的后侧11. A similar bone in many vertebrates.桡骨：许多脊椎动物具有的类似的骨头语源:Latin [ray] 拉丁语 [射线] |
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