They are used about as much as XML's ID and IDREFs, which is to say that some applications will use them a lot, and some never.
其应用情况与XML的ID和IDREF相似，也就是说，有些应用程序会大量使用，而有些应用程序则根本不使用它们。
The National Institute of Standards and Technology (NIST) has recently released thousands of photos, some never-before-seen, of the collapse of the World Trade Center in 2001.
美国国家标准技术研究所(NIST)最近公布了数千张有关2001年世贸中心倒塌的照片，有些是前所未见的。
Kwon chats candidly and answers some never-before-asked questions revealing that he is proud of where he is today.
权相佑很坦率地回答了许多以前未有涉及的问题，也率直地表现出对自己如今所处位置的满意。
WSJ: Some people immediately grasp this and some never do, but is it something that can be taught?
有些人立刻就能把握这一点，而有人永远无法掌握。员工能通过学习获得这种全局观吗？
WSJ: Some people immediately grasp this and some never do, but is it something that can be taught?
有些人立刻就能把握这一点，而有人永远无法掌握。员工能通过学习获得这种全局观吗？
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