Even though use cases provide more scope around the actual system interaction, the system column provides a clear picture of the system responsibility indicated in the right column.
尽管用例为实际的系统交互提供了更大的余地，但是系统栏仍然提供了一幅在右侧栏里所指示的系统职责的清晰画面。
Even though use cases provide more scope around the actual system interaction, the system column provides a clear picture of the system responsibility indicated in the right column.
尽管用例为实际的系统交互提供了更大的余地，但是系统栏仍然提供了一幅在右侧栏里所指示的系统职责的清晰画面。
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