Traditional data mining algorithm is oriented relational database and data warehouse, and can not be directly used for data mining in XML documents.

传统数据挖掘算法是面向关系数据库和数据仓库的，不能直接用于XML文档的数据挖掘。

youdao

However, the perturbation methods for distinct or repeated eigenvalues can not be directly used to deal with the vibration modes with close eigenvalues.

然而，已有的孤立特征值摄动法和重特征值摄动法都难于用来解决密集模态的摄动问题。

youdao

The results of the present experimental studies can not be directly used for field practices, and need to be improved and have to face a great challenge.

③目前的实验研究结论不能直接应用于现场生产，实验研究有待改进且难度较大。

youdao

"Of course, it does not mean that what can be 'spared' in the rich countries could directly be used to feed population in developing countries, " explains Paillard.

CNN: French report suggests new ways to feed the future

This attack, like the one against iOS apps, relies on the fact that Apple does not link specific purchases directly to a customer or device, which means that a single purchased receipt can be used repeatedly.

FORBES: Connect