developable surfaces的用法和樣例：
例句
- A developable surface is one that can be made from a flat sheet without any in-plane strains.
可展曲面是一個可以由平板在不發生任何面內應變的條件下彎成的曲面。 - The results of the calculating examples show that this method is accurate when the curved surface is developable, and has high precision when the curved surface is undevelopable.
算例表明，本方法對可展曲面的展平是精確的，對不可展曲面的展平精度很高。
