| 词汇 | radian |
| 释义 | radian noun [ C ] mathematics specialized uk/ˈreɪ.di.ən/ us/ˈreɪ.di.ən/ 弧度 the measure of an angle at the centre of a circle opposite an arc (= part of the edge of a circle) that is the same length as the radius (= the line from the centre to the edge of the circle) |
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