absolute radius of curvature

例句：

1. 1. The sphere's surface is a perfect circle with an absolute radius of curvature.
   球的表面是一个完美的圆，曲率的绝对半径。
2. 2. The engineer used the formula to calculate the exact radius of curvature for the curve.
   工程师使用这个公式来计算曲线的确切曲率半径。
3. 3.The scientist discovered a new method to measure the absolute radius of curvature in materials.
   科学家发现了一种新的方法来测量材料中的曲率绝对半径。