人们不能把重新设计数据库仅仅当成系统维护的普通一部分。否则的话，对系统进行大的改动会变的难以想象的困难。

People simply do not think about redesigning a database as a normal part of systems maintenance, and, as a consequence, major changes are often unbelievably difficult.

youdao

人们不能把重新设计数据库仅仅当成系统维护的普通一部分。否则的话，对系统进行大的改动会变的难以想象的困难。

People simply do not think about redesigning a database as a normal part of systems maintenance, and, as a consequence, major changes are often unbelievably difficult.

youdao