双曲线

例句：

1. 1. The curve of the mountain is a perfect example of a double curve.
   山的曲线是一个完美的双曲线例子。
2. 2. The physicist discovered the law of double curvature in his research.
   物理学家在他的研究中发现了双曲率定律。
3. 3. The double curve of the river is an important landmark for navigation.
   河流的双曲线是导航的重要标志。