nonempty finite set

例句：

1. 1. A nonempty finite set is a mathematical concept that refers to a collection of elements that is both nonempty and hasa finite number of elements.
   一个非空有限集合是数学中的一个概念，指的是一个既非空又具有有限数量元素的集合。
2. 2. In mathematics, a nonempty finite set is often used to represent a set of objects that are not empty and have a finite number of elements.
   在数学中，非空有限集常用来表示一组对象，这些对象不是空的且具有有限数量的元素。
3. 3. The set of natural numbers is an example of a nonempty finite set, as it contains all positive integers and has a finitenumber of elements.
   自然数集是一个非空有限集的例子，因为它包含所有正整数且具有有限数量的元素。