Noun:

1. (mathematics) the number of elements in a set or group (considered as a property of that grouping)

cardinaln.红衣主教；鲜红色；基数；北美红雀adj.主要的；深红色的Cardinal Numbers基数词, 基数数字cardinal stimuli基本色质cardinal measure基数测度cardinal symptom主要症状cardinal product基数积cardinal splines基数样条函数cubic spline(s)三次样条函数cardinal in curian.住在教廷内之枢机主教cardinal-deaconn.[宗] 枢机六品；枢机助祭cardinal-bishopn.[宗] 枢机主教cardinal quadrant主部

1. The singular and plural names are used depending on the cardinality of the relationship.
   使用单数或复数名称取决于关系的基数。
2. We describe a parent class whose elements have a property with cardinality equal to one.
   我们描述一个父类，它的元素有一个基数等于一的属性。