A core reservation service that solves the problem of reserving a resource for a given time period. For technical details, please refer to RFC: Core Reservation Service
RFCs: (处理思考)
在写代码之前，多想想你要解决的问题，从各个角度思考一下他的利弊
- ORM：(Object Relational Mapping) 对象关系映射
- 解决对象和关系型数据库之间的数据交互问题