Pattern matching is also useful for the design problem where you need to get at data inside an object, but only in special circumstances.

在你遇到需要从对象内部提取数据的设计问题时，模式匹配也有用，但是仅限一些特殊的情况。

youdao

Storing data is very useful, but often, we want to get some information back.

存储数据非常有用，但我们往往想要获得一些反馈信息。

youdao

Once you have some sources of data in RDF, and you have ontologies to let you determine the relationships between them, you need a way to get useful information out of them.

一旦您拥有了采用RDF的一些数据源，并且拥有可以确定它们之间关系的本体，那么您需要一种从中获得有用信息的方法。

youdao

This is useful especially when we get to details like forensics and looking at data on a hard drive, - 'cause if you don't know how much store-- how many bits are composing your file, you're never gonna recover that data or be able to access what you're looking for.

这是很有用的，尤其是在法庭上,查看硬盘驱动器里的数据时，如果你连-,文件有多少比特都不知道，你如何去恢复数据,获取你想要的信息呢。

哈佛公开课 - 计算机科学课程节选

With new VRM tools, you will be able to work not only across many silos at once but to improve them by making connections and providing useful data they wouldn't get on their own.

WSJ: The Customer as a God: The Future of Shopping

Entrepreneurs and companies will take raw info, combine it with other raw data to produce useful information, and get it to farmers on cell phones, in publications and online.

FORBES: Can Technology Help Farmers Adapt to Climate Change?