curved knife

例句：

1. 1. Thecar is designed with a curved roof for better aerodynamics.
   这辆车设计有曲线屋顶，以获得更好的空气动力学性能。
2. 2. The painting has a curved edge that adds to its artistic appeal.
   这幅画有一个曲线边缘，增加了它的艺术吸引力。
3. 3. The architect wanted to create a curved facade that would blend in with the surrounding buildings.
   这位建筑师想要创造一个与周围建筑融为一体的曲线立面。