Saving to an old file format; data may be lost.

用旧文件格式保存，可能丢失部分数据。

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If the user has forgotten to make backup copies of data on the hard disk, data may be lost.

如果用户忘记在硬盘上备份数据，数据就可能丢失。

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If an application sees the warning flag set, it could inform the user that this data is already in use and any changes made may be lost.

如果应用程序发现设置了警告标记，它将通知用户该数据已被使用，所做的任何更改可能都会丢失。

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Data lost in hacking attacks may never be recovered.

WSJ: Anders Fogh Rasmussen: NATO's Next War��in Cyberspace

Consumers who receive notices saying their data has been lost by a company or government agency may be a different story: Their chance of being defrauded rises by about 300%, Vamosi says.

FORBES: Consumers Are Ditching The $2.4 Billion ID Theft Protection Market