radius

1. N-SING The radius around a particular point is the distance from it in any direction. 範圍

Nick has searched for work in a ten-mile radius around his home. 尼尅已經在以家爲中心10英裡的範圍內尋找工作。

2. N-COUNT The radius of a circle is the distance from its centre to its outside edge. 半逕

He indicated a semicircle with a radius of about thirty miles. 他標示出一個半逕大約三十英裡的半圓。