radius

英 [ˈreɪdiəs]

美 [ˈreɪdiəs]

n. 半径(长度); 半径范围; 周围; 桡骨

复数：radii　

Collins.1 / BNC.7090 / COCA.9413

牛津词典

noun

半径（长度）
a straight line between the centre of a circle and any point on its outer edge; the length of this line
半径范围；周围
a round area that covers the distance mentioned from a central point
1. 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。
桡骨
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

N-SING 半径范围；半径距离
Theradiusaround a particular point is the distance from it in any direction.
1. Nigel has searched for work in a ten-mile radius around his home.
  奈杰尔一直在他家周围10英里的范围内找工作。
N-COUNT 半径
Theradiusof a circle is the distance from its centre to its outside edge.
1. He indicated a semicircle with a radius of about thirty miles.
  他标示出了一个半径大约为30英里的半圆形。

noun

support consisting of a radial member of a wheel joining the hub to the rim
Synonym:spokewheel spoke
the length of a line segment between the center and circumference of a circle or sphere
Synonym:r
the outer and slightly shorter of the two bones of the human forearm
a circular region whose area is indicated by the length of its radius
1. they located it within a radius of 2 miles
a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere)

Here is atomic radius versus atomic number.
这是原子半径和原子序数。
The necessary exposure time for corona at different solar radius is estimated as well.
文章还估计了拍摄不同太阳半径上日冕所需的曝光时间。
We give a proof of some upper bounds for the spectral radius of graphs.
该文给出了图的谱半径的一个可达上界的证明。
And, there's a radius that's been painted blue in it.
半径被涂上了蓝色。
And, let's see, we've talked about radius, we've talked about energy.
我看看，我们已经讲了半径了，讲了能量了。
The radius variation of the jet in the motion process is deduced based on the virtual origin concept.
基于虚拟原点概念推导了运动过程中射流径向尺寸变化规律。
Now I have one that has a very small radius compared to this one.
现在还有一个半径很小的，和这个相比。
Where are you humerus, radius, and ulna?
肱骨、桡骨和尺骨在哪儿？
And what I calculated was the terminal velocity as a function of radius of these ball bearings.
我计算的是终端速度，作为这些钢珠的，半径函数。
Further more, the effect of doping concentration and radius of doped area on fiber's nonlinearity is studied.
此外，还讨论了掺杂浓度和掺杂半径对光纤非线性系数的影响。