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词汇 radius
释义
radiusra·di·us /ˈreɪdiəs /

noun

[countable] (plural ra·di·i /ˈreɪdiaɪ /)
  1. (mathematics数学) the distance from the center of a circle to the outside edge半径
  1. a round area that is measured from a point in its center半径范围;周围;方圆The wreckage of the plane was scattered over a radius of several miles.飞机残骸散落在方圆几英里的地方。
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