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1·They said the allegations related to an isolated case of cheating.

他们说这些指控与一件孤立的欺诈案有关。《柯林斯英汉双解大词典》

2·It could be only an isolated case.

这有可能只是一个孤立事件。

3·Hopefully this is an isolated case.

希望这只是非全面性的单一各案。

4·Is this an isolated case?

这是否是一个孤立的事件？

5·This is not, after all, an isolated case.

毕竟，这不是一个单独的事件。

6·Now this sounds like it could be an isolated case.

看起来这不过是一次孤立的事件。

7·This is not an isolated case and police say a number of factors are to blame.

这不是一个单纯的案件，警方认为要归咎到多方面的原因。

8·We must understand why, but we hope and think that this was just an isolated case.

我们必须知道原因，希望这仅仅是个例外。

9·Vertebral metastases are exceedingly rare, and only isolated case reports have described them.

椎体转移极其少见，只有零星的个案报道。

10·Or maybe this is an isolated case and everyone else really does understand what's in a service?

或者这只是一个不相干的个案而已，每个人实际上都理解了“什么是一个服务”？。