Correctly specified use cases provide a direct link to help users and developers develop a common understanding of the user requirements for a system.

正确地指定用例能够提供一个直接的连接，来帮助用户和开发人员开发一个系统用户需求的共同理解。

youdao

As of this writing, YQL doesn't allow you to link tables through common keys (a join), but only permits you to use the results of one query inside another (a subquery).

在撰写本文时，YQL还不允许您通过公用键(一个联接)来链接表，只允许您在一个查询(一个子查询)内使用另一个查询的结果。

youdao

Frames, Flash and AJAX all share a common problem - you can't link to a single page.

框架，Flash和Ajax所有这些都有一个共同的问题-你不能链接到一个单一的网页。

youdao

What connects them is their link to a common ancestor -- the family patriarch William Harrison Rand.

CNN: The story

If this ambitious project ever takes off, the question will be what common currency to link to.

ECONOMIST: The CFA franc and the euro

The health authorities are trying to establish a link between the victims, who are said to have had no serious illnesses nor common health issues.

BBC: Brazil health authorities investigate MRI scan deaths