图象专家曾猜测，幽灵照片是由大火的亮度造成的错觉。

Photographic experts have suggested that the 'ghost' image was a trick of the light caused by the fire.

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服务器用起来很简单——一张信用卡和几个按键就能让你的业务进入云得范畴——一些专家说这能让你有一个感觉很安全的错觉。

EC2 is so simple to use -- a credit card and a few keystrokes literally gets your business into the cloud -- that some experts say can give a false sense of security.

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