sheaf theory的用法和样例：
例句
- A deformable layer theory does not appear to be tenable in glass-reinforced composites.
变形层理论在玻璃增强复合材料中说服力不强。 - The distributions of the field variations are given.The new friction layer theory is applied and nonsteady and steady deformation are studied.
应用新的摩擦层理论，研究了非稳态和稳态变形，实现了工件成形过程的计算机动态图形显示。
