radiusKK [ˋrediəs] /ˈɹeɪdiəs/发音名词1半径数学Measure the radius of the circle before calculating its area.计算圆面积之前,先量出它的半径。2范围、周边范围There are three coffee shops within a one-kilometer radius.一公里范围内有三家咖啡店。3桡骨解剖She fractured her radius when she fell off the ladder.她从梯子上摔下来,摔断了桡骨。用这个字练口说→