When a process opens a file, it exists on disk even if deleted, as long as the process holds the file open.

当进程打开了某个文件时，只要该进程保持打开该文件，即使将其删除，它依然存在于磁盘中。

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Similarly, if the class is deleted, the diagram element will also be deleted.

与之类似，如果类被删除的话，那么图表元素也会被删除掉。

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For example, the record can't be deleted if child records refer to it through a relationship.

例如，如果子记录通过某种关系引用父记录，父记录将无法删除。

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Also unique to Red October was its ability to hide on a machine as if deleted, said Prof Woodward.

BBC: 'Red October' cyber-attack found by Russian researchers

Even if they deleted regular cookies, information about their Web-browsing could have been retained by Microsoft.

WSJ: Latest in Web Tracking: Stealthy 'Supercookies'

Parents also need to be able to review their children's data and have these deleted if they so wish.

ECONOMIST: Small children are a big headache for the social network