音标:['reidiәs] ; 柯林斯词典等级:1 级;
n. 半径, 范围, 辐射光线
[电] 半径
n. the length of a line segment between the center and circumference of a circle or sphere
n. a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere)
n. a circular region whose area is indicated by the length of its radius
n. the outer and slightly shorter of the two bones of the human forearm
词型变化:名词复数形式 : radii
考试类型:[四级/六级/考研/托福/IELTS/GRE]
词性分布:
名词100%

radius的用法和样例:

例句

用作名词(n.)
  1. Nobody is allowed to enter the operation radius.不允许任何人进入工作半径范围以内。
  2. What is the radius of this circle?这个圆的半径有多长?
  3. We can compute the circular area with radius.我们能用半径计算出圆的面积。
  4. The radius expands markedly at its lower end.桡骨下端明显扩张。
  5. The police searched all the woods within a six-mile radius.警察搜索了在周围六英里以内的树林各处。

常见句型

用作名词(n.)
  1. We are measuring the radius of the circle.我们正在测量圆的半径。
  2. He has visited every shop within a radius of two miles.周围两英里以内的店铺他都去过。

词汇搭配

用作名词 (n.)
~+介词
  • radiusof action活动半径;有效破坏半径
  • the radiusof curvature曲率半径

经典引文

  • The roads are to be watched within a radius of twenty miles.

    出自:H. Green
  • The wreckage was scattered over a radius of a mile.

    出自:Times
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