unbounded set of real numbers

例句：

1. 1. The setof all prime numbers is an example ofan unbounded set.
   所有质数的集合是无界集的一个示例。
2. 2.In mathematics, the unbounded set represents a concept that goes beyondthe traditional finite sets.
   在数学中，无界集代表了超越传统有限集的概念。
3. 3. The unbounded set theory hasbeen applied to various fields such as computerscience and artificial intelligence.
   无界集理论已被应用于计算机科学和人工智能等各个领域。