单词：radius
[电] 半径
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
考试类型：[四级/六级/考研/托福/IELTS/GRE]
radius的用法和样例：
例句
- Nobody is allowed to enter the operation radius.不允许任何人进入工作半径范围以内。
- What is the radius of this circle?这个圆的半径有多长?
- We can compute the circular area with radius.我们能用半径计算出圆的面积。
- The radius expands markedly at its lower end.桡骨下端明显扩张。
- 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
- We are measuring the radius of the circle.我们正在测量圆的半径。
- 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
- 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. GreenThe wreckage was scattered over a radius of a mile.
出自：Times
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