You want to minimize the points of contact between your program and the database so that if you change systems at some point, the change is actually feasible.
需要使程序与数据库之间的联系点尽可能少，以便在某个点更改系统时，可以顺利进行更改。
The primary point of contact is presumed to be the principal inside change agent for the client.
主要的联系人假设为客户的变更代理中的负责人。
The primary point of contact is presumed to be the principal inside change agent for the client.
主要的联系人假设为客户的变更代理中的负责人。
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