principle addition canonical expansion theorem

例句：

1. 1. The principle of addition is fundamental to the development of mathematics.
   加法原理是数学发展的基础。
2. 2.The canonical expansion theorem has been a cornerstone in the study of quantum mechanics.
   公理扩展定理一直是量子力学研究的基础。
3. 3. In this paper, we will discuss the application of the principle addition and the canonical expansion theorem in solving complex problems.
   在本文中，我们将讨论这些原理和公理扩展定理在解决复杂问题中的应用。