| 释义 |
ra·di·us /`redɪəs; ˈreɪdiəs/
n [C] plural radii /-dɪˏaɪ; -diaɪ/
1 the distance from the centre of a circle to the edge 〔圆的〕半径
2 within a 10 mile/100 metre etc radius within a distance of 10 miles etc from a place in any direction 方圆 10 英里/ 100 米等范围内
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