noun🔗Share基数，势。 (of a set) The number of elements a given set contains."The empty set has a cardinality of zero."空集包含零个元素，所以它的基数是零。mathnumberlogiccomputingChat with AIVocabulary GamePractice Reading
noun🔗Share基数，关系数量，关联度。 The property of a relationship between a database table and another one, specifying whether it is one-to-one, one-to-many, many-to-one, or many-to-many."The cardinality between the "students" table and the "classes" table is many-to-many, since one student can enroll in many classes, and one class can have many students. "“学生”表和“课程”表之间的关系数量是多对多，因为一个学生可以选择多门课程，而一门课程可以有很多学生。computinginternettechnologytechnicalsystemChat with AIVocabulary GamePractice Reading
noun🔗Share枢机主教的地位，红衣主教身份 The status of a cardinal."The cardinality of the set of vowels in the English alphabet (a, e, i, o, u) is five. "英语字母表中元音集合（a, e, i, o, u）的元素个数是五。religionChat with AIVocabulary GamePractice Reading
