说明：  关联规则的目的在于在一个数据集中找出项之间的关系，也称之为购物蓝分析 (market basket analysis)。Apriori algorithm是关联规则里一项基本算法。
(The purpose of association rules in a data set to identify relationships between items, also known as shopping blue analysis (market basket analysis). Apriori algorithm is a fundamental algorithm in association rule.)