The use cases and the use case requirements icons are annotated with a small arrow to indicate they are linked.

用例和用例请求上有小箭头的标识，表明它们是相连接的。

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In that case, add the action of clicking the arrow button.

在这种情况下，添加单击箭头按钮的操作。

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A suspect link (red slashed arrow in Figure 5) indicates that test case TC1.2 may need to be revisited due to a change in use case UC1.3.

可疑链接(图5的红色斜线箭头)说明测例TC 1.2可能因用例uc1.3的改变而需要修订。

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