radius
['reɪ.di.əs] (plural radii)
noun countable
DISTANCE 长度
■(the length of) a straight line joining the centre of a circle to its edge or the centre of a sphere to its surface （圆或球体的）半径，半径长度•The radius of this wheel is 30 cm.这个轮子的半径是30厘米。 •This wheel has a radius of 30 cm.这个轮子的半径是30厘米。 ■a distance 半径距离；半径范围；周围•The station, shopping centre and school lie within a one-mile radius of the house.车站、购物中心和学校都在距这所房子一英里的范围之内。
['reɪ.di.əs] (plural radii)
noun countable
BONE 骨 specialized
■the thicker of the two bones in the lower arm 桡骨 |