radius

英 ['reɪdiəs] 美 ['reɪdiəs]

• n. 半径范围；半径；桡骨；辐射区

双解释义

n. (名词)

1. [C]半径(距离）

   (length of a) straight line from the centre of a circle or sphere to any point on its circumference or surface

2. [C]用半径度量的圆形面积；半径范围

   circular area measured by its radius

详尽释义

n. 名词

1. 半径（范围、距离、长度）
2. 周围
3. 范围
4. 辐射状部分，辐射物，辐条，辐
5. 【解】桡骨
6. 【动】径骨
7. 【昆】径脉
8. 【物】辐射线
9. 【无线电】径向射线
10. 针
11. 【纺】杼
12. 【植】射出花
13. 雷迪厄斯，拉迪乌斯，拉迪于斯（音译名）

abbr. 缩略词

1. =Remote authentication Dial In User Service，远程认证拨号用户服务

v. 动词

1. 把...修圆磨光

英英释义

Noun:

1. the length of a line segment between the center and circumference of a circle or sphere

2. a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere)

3. a circular region whose area is indicated by the length of its radius;

   "they located it within a radius of 2 miles"
   

4. the outer and slightly shorter of the two bones of the human forearm

5. support consisting of a radial member of a wheel joining the hub to the rim

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。

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

词汇搭配

用作名词 (n.)

～+介词

• radius of action 活动半径；有效破坏半径
• the radius of curvature 曲率半径

近反义词

【近义词】

• circle 圆圈
• breadth 宽度
• line 线
• distance 距离
• length 长度
• area 面积
• range 范围
• ambit （权势等的）范围...
• extent 广度
• bounds 界限
• scope 机会
• area of influence 影响区域,影响面积...
• umbrella 伞
• reach 到达
• sweep 打扫
• remit 汇出
• r 字母r
• spoke 轮辐
• wheel spoke 轮辐