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radii
The radius around a particular point is the distance from it in any direction.
Nick has searched for work in a ten-mile radius around his home.
尼克已经在家周围10英里的范围内找工作了。
within a fifty-mile radius of the town.
以该镇为中心方圆50英里的范围内。
Fragments of twisted metal were scattered across a wide radius.
扭曲的金属碎片散落在一个很大的范围内。
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.
他标示出一个半径大约30英里的半圆。
the radius of a circle is equal to one-half its diameter.
一个圆的半径相当于其直径的一半。
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