什么时候我应当使用 Native-XML 数据库系统，而什么时候应当使用关系数据库系统呢？

When should I use a Native XML Database System or a Relational Database System?

youdao

分布式数据库系统可以看作是一系列集中式数据库系统的联合。

Distributed database system may be regarded as a series of union of centralized database system.

youdao

分布式数据库系统虽然基于集中式数据库系统，但却有一定的特色和理论基础。

The distributed database system has its own characters and theory, though it was based on the centralized database system.

youdao

It's true of Windows, it's true of the Sequel Databases from guys like Oracle, the Google guys were at it for a number of years before that thing really took off.

视窗“系统就是这样，甲骨文公司的关系数据库也是这样，谷歌公司的创立者花了很多年,才让一切走上正轨。

斯坦福公开课 - 微软CEO-Steve.Ballmer谈科技的未来课程节选