The algorithm is based on row enumeration, which can find high-utility long itemsets directly by intersecting long transactions, without extending short itemsets step by step.
该算法基于行枚举，通过长事务的交集运算，直接得到长项集，不必从短项集逐步扩展得到长项集。
2
If utility bills are high, get the whole family involved in the conservation plan.
如果水电费很高，就让全家人都参与到能源节约计划中来吧。
3
If utility bills are high, get the whole family involved in a conservation plan.