proper morphism

例句：

1. 1. In mathematics, a proper morphism is a function that preserves the structure of the category it maps into.
   在数学中，一个适当的映射是一个函数，它保持了它在映射到的类别的结构。
2. 2. The proper morphism between two categories is essential for understanding how objects in one category canbe mapped to objects in another.
   两个类别之间的适当映射对于理解如何将一个类别的对象映射到另一个类别中的对象的至关重要。
3. 3.The proper morphism between two categories ensures that the structure of the first category is preserved in the second category.
   两个类别之间的适当映射确保了第一个类别的结构在第二个类别中得到保留。