[N-SING 单数名词]半径范围;半径距离 The radius around a particular point is the distance from it in any direction.
[with supp]
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。
2
[N-COUNT 可数名词]半径 The radius of a circle is the distance from its centre to its outside edge.
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。
Oxford
ra·dius/ˈreɪdiəs; NAmEˈreɪdiəs/noun _circles_comp.jpg _circles1.jpg (pluralradii/ˈreɪdiaɪ; NAmEˈreɪdiaɪ/)1a straight line between the centre of a circle and any point on its outer edge; the length of this line 半径(长度)☞compare
diameter
(1 )2a round area that covers the distance mentioned from a central point 半径范围;周围◆They deliver to within a 5-mile radius of the store.他们对距离店铺 5 英里的范围内送货上门。3( anatomy 解) 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 桡骨☞see also
1the distance from the centre to the edge of a circle, or a line drawn from the centre to the edge → diameter2an area that covers a particular distance in all directions from a central point: The shock of the explosion was felt over a radius of forty miles.within a 10-mile/200-metre etc radius There are more than a dozen golf courses within a 15-mile radius of St Andrews.3technical the outer bone of the lower part of your arm
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