As a rule, software systems do not work well until they have been used, and have failed repeatedly, in real applications.

As a rule, software systems do not work well until they have been used, and have failed repeatedly, in real applications.

通常，软件系统只有在实际应用中使用过并多次失败之后才能正常工作。

-- Dave Parnas 戴夫·帕纳斯