| 释义 |
| | | | NOUN | | | | | /ˈreɪdiəs/ | | | | | 1 | the distance from the centre of a circle to its edge , or a straight line from the centre to the edge （圆的）半径 | | | 1a | a particular distance in all directions from a central point 半径范围 | | All roads within a two-mile radius of the stadium were closed. 体育馆两英里范围内的所有道路都已封闭了。 | | | | | 2 | science one of the bones in your lower arm 桡骨 | | |