finitely additive class

例句：

1. 1. The finitely additive class is a subset of the real numbers.
   有限加法类是实数集的一个子集。
2. 2.Infinitely additive classes are used in computer science to represent sets of elements that can be added together indefinitely.
   无限加法类在计算机科学中用于表示可以无限相加的元素集合。
3. 3.The finitely additive class is a fundamental concept in mathematics and has applications in various fields such as statistics and economics.
   有限加法类是数学中的一个基本概念，并在统计学和经济等领域有广泛的应用。