French curve

例句：

1. 1. The French curve is a classic design element in architecture.
   法式曲线是建筑中的经典设计元素。
2. 2. The French curve is used to describe the curvature of a surface.
   法式曲线用于描述表面的曲率。
3. 3. The French curve is often used in graphic design to create a smooth and elegant effect.
   法式曲线在平面设计中常用来创造平滑而优雅的效果。