The twin curved glass incised with an abstract pattern stabilizes three spaces: one internal, one external and one interspatial.

上面雕刻有抽象图案的双曲面玻璃使三个（内，外和际）稳固。

This article not only discusses the ruled surface features of uniparted hyperboloid and its application in archtecture engineering but also discusses the teaching of the ruled surface.

文主要讨论了单叶双曲面的直纹性,指出它在建筑工程中的应用,并对直纹面的教学作了探讨。