提要源输入组件的逻辑只是简单地从文件中读取，而文件的名字则以函数输入参数的形式传递。
The logic in the feed sources input component simply reads from a file, whose name is passed as a function input argument.
很多时候需要一定的业务逻辑，从一个地方读取数据、到达另一个地方之前解释或修改数据。
Many times you need business logic to interpret or modify the data after it is read from one place, but before it arrives at another.
应用程序和业务逻辑创建、读取、更新或删除与实现业务目标相关联的语义。
Application and business logic creates, reads, updates, or deletes the semantics associated with achieving business goals.
应用推荐