本论文目前只停留在宏观层次和描述性的分析上，还需要做进一步的深入研究。
The study of the paper is only the macro-levels and qualitative analysis , it needs further study.
旨在对1994 - 2008年间全球范围内报告的间皮瘤死亡人数进行描述性分析。
To carry out a descriptive analysis of mesothelioma deaths reported worldwide between 1994 and 2008.
您可能拥有关于事务的较好的描述性信息(比如注释或注解)，并且不想丢掉这些信息，但是这对事务数据的分析没有用处。
You may have good descriptive information (such as notes or comments) about a transaction that you do not want to lose, but that isn't useful for analyzing the transaction data.
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