更糟糕的是，即使像对现有组件的升级这样的重要修改也会导致整个代码基中断的事情出现。
Worse, even important modifications, such as upgrades to existing components, can cause things to break throughout the code base.
举例来说，一个团队需要处理一个区域产业协会的枚举列表（或任意现有列表）为例，并根据使用修改模式组件。
Take, for example, a team that works with a domain industry consortia enumerated list (or any preexisting list) and adapts schema components for its use cases.
在SCM(在维护各种组件的的历史记录时)中修改现有的资源树将是困难的和费时的。
Modifying existing source trees in an SCM (while maintaining the history of the various components) can be difficult and time consuming.
接下来，开发人员对现有的LotusNotes应用程序进行修改，使它们可作为最终的复合应用程序的组件。
Next, the developers modified the existing Lotus Notes applications to make them useful as components in the final composite application.
不要修改现有的themes .mgrp资产组，因为其他图像组件可能仍然依赖现有的PrefixURL。
Do not modify the existing themes.mgrp asset group since other image components may still rely on the existing Prefix URL.
为了实现向后兼容，COM互操作允许对现有的COM组件进行访问而无需修改原始组件。
For backward compatibility, com interop provides access to existing com components without requiring that the original component be modified.
为了实现向后兼容，COM互操作允许对现有的COM组件进行访问而无需修改原始组件。
For backward compatibility, com interop provides access to existing com components without requiring that the original component be modified.
应用推荐