开发抽取代码以获取丢失的数据元素。

Develop extraction code to obtain the missing data elements.

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这给了XML查询语言更多自由度来处理丢失的数据。

This gives an XML query language additional degrees of freedom for dealing with missing data.

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您的客户应在其数据源中修正丢失的数据，但他们可能会寻求帮助。

Your customer should fix missing data in their data source, but they might ask for help.

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When you're working on a file, it's saving constantly to RAM but also hopefully to disc, the hard disk so you don't actually lose it if the power goes off.

当你打开一个文件，它不断地保存在内存中,但对于光盘，硬盘,当你断开电源的时候，数据不会丢失。

哈佛公开课 - 计算机科学课程节选

And so this is why in problem set 5 last year when I took photographs on campus with a compact flash card, just standard consumer media and I accidentally formatted that compact flash card, I only lost the first few kilobytes, the first few thousand bits on that compact flash card.

这也是去年的套题5中,我们在校园里面用配有，简易闪存卡的标准摄像机拍照片,我不小心格式化了这个简易闪存卡,其实我只是丢失的最开头的几千个字节的数据。

哈佛公开课 - 计算机科学课程节选