yí gè / jí hé / rú guǒ / zhǐ yǒu / yǒu xiàn / gè / yuán sù / jiù / jiào zuò / yǒu xiàn jí

一个集合如果只有有限个元素，就叫做有限集。

A set is called a finite set if it has only finitely many elements.