The group buys the organization way the flexibility, changed the game rule which the tradition expends, regardless in the time in the cost, sells the field to be able not hold a candle.

团购组织方式的灵活性，改变了传统消费的游戏规则，无论是在时间上还是成本上，卖场都是望尘莫及的。

youdao

"If we don't have a clear rule on cost we are not going to reach our target group, " he said.

BBC: Access to banking services

This rule tells us that an enormous amount of the health system cost is centered in a very concentrated group of people.

FORBES: Why 5% of Patients Create 50% of Health Care Costs