📖 中文释义
- 辐射光线, 径向射线, 半径, 半径范围, 界限, 范围, 桡骨
📘 English Definition（英文释义）
- n the length of a line segment between the center and circumference of a circle or sphere
- n a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere)
- n a circular region whose area is indicated by the length of its radius
- n the outer and slightly shorter of the two bones of the human forearm
- n support consisting of a radial member of a wheel joining the hub to the rim