紧密耦合系统可能很难维护，因为一个系统子组件中的更改通常需要立即对其他子组件进行调整。
The tight-coupled systems can be difficult to maintain, because changes in one system subcomponent usually require the other subcomponent to adapt immediately.
它们与系统紧密耦合且不能被外部化吗？
Are they tightly coupled to the system and cannot be externalized?
另外，系统通常涉及组件之间的紧密耦合。
Also, the systems typically involved a tight coupling between components.
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