family of half-curves

例句：

1. 1. The shape of the curve is determined by the force applied to it.
   曲线的形状由施加在它上的力决定。
2. 2.The scientist discovered a new type of half-curve that could be used for navigation.
   科学家发现了一种新类型的半曲线，可以用来导航。
3. 3. The artist drew a half-curve on the canvas to add depth and texture.
   艺术家在画布上画了一条半曲线，以增加深度和纹理。