The word 'radius' refers to the distance from the centre to the circumference of a circle or sphere, or the length of this distance.
单词 'radius' 指半径（距离）、圆形面积或半径范围。
| 单词 | radius |
|---|---|
| 音标 | [ˈreɪdiəs] [ˈrediəs] |
| 释义 | n.["半径（距离）","用半径度量的圆形面积","半径范围","桡骨"] |
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