A case is a distinct member of a case set, and can be a member of multiple case sets.

事例是事例集的非重复成员，且一个事例可以是多个事例集的成员。

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However, the research model needs to be testified further by multiple case studies and empirical researches.

本案例构建的研究模型需要多案例研究以及实证研究的进一步检验和论证。

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Data come from multiple sources on board aircraft, in case one fails, and multiple computers run together on the ground to provide backup.

WSJ: How New Air-Traffic Control Systems Operate Over Oceans

The appeals court issued multiple rulings in this case, with a three-judge panel initially siding with Arizona.

NPR: Must Voters Have To Prove Citizenship To Register?

This may especially be the case when multiple images need to be repeated.

CNN: How can I make my mammogram hurt less?