aeiou24680
radius n.桡骨；半径范围；半径（长度）；周围
美 [ˈreɪdiəs] 英 ['reɪdiəs]
复数：radii 复数：radiuses
同义词n.line,distance,length,area,range
英汉翻译
1.半径（长度）a straight line between the centre of a circle and any point on its outer edge; the length of this line
2.半径范围；周围a round area that covers the distance mentioned from a central point
3.桡骨the shorter bone of the two bones in the lower part of the arm between the elbow and the wrist, on the same side as the thumb
