Researchers at Cambridge University have found that nearly half of the social networking sites don't immediately delete pictures when a user requests they be removed.

剑桥大学的研究人员发现，近一半的社交网站在用户要求删除图片时不会立即删除。

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At times, we just need to delete our memberships to some sites, either in an effort to simplify our lives or just because we've grown tired of a particular site or service.

一些时候，我们仅仅需要删除自己在某些网站上的会员身份，以简化自己的生活，或者只是因为我们已厌倦了某个特定网站或服务。

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A further 57 per cent have asked friends or relatives to delete pictures from sites like Facebook because they were unflattering.

更甚一步，57%女性曾要求亲戚朋友删除脸书等网站照片，只因她们拍得不好看。

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There are even sites where they can pledge to delete their Facebook accounts.

CNN: The anti-social network: Life without Facebook

Clear your browser cache, remove passwords to Web sites you use from work, such as your personal email or online bank account and delete any personal files on your work computer that aren't relevant to work.

WSJ: How To Resign on Good Terms