| 单词 | 弧度 |
| 释义 | 〔angular〕Measured by an angle or by degrees of an arc.用角测量的，用弧度测量的〔radian〕A unit of angular measure equal to the angle subtended at the center of a circle by an arc equal in length to the radius of the circle, approximately 57°17′44.6". See table at measurement 弧度：平面角的一种衡量单位，其大小为长度等于半径的弧对的圆心角，1弧度角约等于57°17′44.6" 参见 measurement〔level〕Flat applies to surfaces without curves, protuberances, or indentations: Flat 指的是没有弧度、隆起或凹陷的表面： |
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