求翻译：作为多案例研究，这篇研究选择的例子有代表性，对结果的分析具体，但是资料来源不够丰富。研究的局限性在案例中作者已经提到，包括作者自己的知识不足。是什么意思？

As a multi- case study examples in this study to select a representative , and the results of analysis of specific , but not rich source of information .

As a number of case studies, this research selected examples are representative, the results of the analysis of specific, however, sources of information are not rich. Study of the limitations in the case, the author has referred to, including the author's knowledge.

As the multi-case research, this research choice example has the representation, is concrete to the result analysis, but the material originates insufficiently richly.The research limitation the author already mentioned in the case that, is insufficient including the author knowledge.

As case studies, examples selected for this study are representative, analysis of results, but the source is not rich enough. Limitations of the study author already mentioned in the case, including the author's own lack of knowledge.

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