| radius | |
| 级别 | 第7级 |
| 音标 | [ ˈreɪdiəs ] |
| 解释 | n.半径，半径范围；有效航程，范围，界限 |
| 英英释义 | (the length of) a straight line joining the centre of a circle to its edge or the centre of a sphere to its surface |
| 发音 |  |
| 例句 |
1. He has visited every shop within a radius of two miles. 周围两英里以内的店铺他都去过。 2. We are measuring the radius of the circle. 我们正在测量圆的半径。 |
