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单词 radius
释义 radiusradiiradiusradius /ˈreɪdiəs/ noun [countable] (plural radii /-diaɪ/) the distance from the centre to the edge of a circlePhraseswithin a 10-mile/200-metre etc radius within a distance of 10 miles etc from a place in any direction: They want to be within a 20-mile radius of the airport.他们想要在离机场20英里的半径范围内。
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