This is a good way to separate out groups of data, and avoid namespace conflicts; for example, two elements in the document are named name, but each belongs to a different namespace.

这是隔离不同数据组和避免命名空间冲突的好方法。例如，文档中有两个元素的名称都是name，但是它们属于不同的命名空间。

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You can add groups of data to a screen.

您可以向屏幕添加数据组。

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The main characteristics of the interior fluid field were described by comparing with two groups of data.

通过两组数据的比较，得到了内部流场的主要特征。

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Using this method means attackers can harvest data from certain groups of users, rather than having to sift through large amounts of data.

BBC: 'Nightclub bouncer' phishing scam found by researchers

Satellite Sentinel is one of a number of groups trying to gather new kinds of data for public interest work.

FORBES: Satellite Imaging As High-Tech Activism: Can It Scale?

Second, U.S. foreign policy cannot be either effectively conceived or successfully executed on the basis of polling data, focus groups or less sophisticated means of determining in which way the political winds are blowing.

CENTERFORSECURITYPOLICY: Freedom Flame 2013