ring of convergent power series

例句：

1. 1.The ring of convergent power series is a fundamental concept in the study of complex analysis.
   收敛幂级数环是复分析研究中的一个基本概念。
2. 2. In this paper, we will discuss the properties of the ring of convergent power series and its applications in engineering.
   在本文中，我们将讨论收敛幂级数环的性质及其在工程中的应用。
3. 3.The ring of convergent power series is an important tool for studying the behavior of functions in the complex plane.
   收敛幂级数环是研究函数在复平面上行为的重要工具。