This paper designs a tree account model, which can meet the flexible payment strategy, especially for multi-accounts and small purse.

设计出了树形账户模型，能够满足对用户灵活付费的策略，更好的支持多账户和小钱包。

youdao

Alternatively, we could keep two lists in each Account model - one for the subscriptions and one for the subscribers.

另外，可以在每个Account模型中保存两张列表—一张用于subscriptions，一张用于subscribers。

youdao

Alternatively, we could keep two lists in each Account model - one for the subscriptions and one for the subscribers.

另外，可以在每个Account模型中保存两张列表—一张用于subscriptions，一张用于subscribers。

youdao