radius [ˈreɪdiəs]
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基本释义
n.半径,半径范围;有效航程,范围,界限
英英释义
(the length of) a straight line joining the centre of a circle to its edge or the centre of a sphere to its surface
参考例句
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。
We are measuring the radius of the circle. 我们正在测量圆的半径。
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