first classification theorem

例句：

1. 1.The first classification theorem states that all objects are either in one of the three classes or belong to none of them.
   第一分类定理指出，所有物体要么是三类之一，要么不属于这三类。
2. 2.This is the first classification theorem, which explains how different types of plants can be classified based on their characteristics.
   这是第一分类定理，它解释了如何根据植物的特性将它们进行分类。
3. 3. The first classification theorem has been proven to be accurate and widely used in various fields of study.
   第一分类定理已被证明是准确且在各个研究领域中广泛使用的。