convex and concave crepe

例句：

1. 1.The engineer designed a new type of convex and concave crepe for the construction industry.
   这位工程师为建筑业设计了一种新型的凸面和凹面纸板。
2. 2. The chef used a concave crepe to fold the pastry into a beautiful shape.
   厨师用一个凹面纸板将糕点折叠成美丽的形状。
3. 3. The artist created a series of convex and concave crepes that depicted the landscape of the city.
   这位艺术家创作了一系列凸面和凹面纸板，描绘了城市的景观。