To be fair to Ellison, the words "cloud computing" have been hyped so often in so many different contexts it does have the ephemeral air of a passing fashion.

为埃里森说句公道话。“云计算”一词在如此多背景迥异的场合，被如此频繁地炒作，也的确像是一种昙花一现的时尚潮流。

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And wonderful, well-intentioned endeavors to build wells or latrines in less-developed communities often have only ephemeral benefit: there is no one to fix them after the college or church group leaves, with little more lasting relationship than a few snapshots and a meaningful story to tell.

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Quick-fix solutions are ephemeral and often counterproductive.

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And while these works may seem ephemeral - often made from sand and mud rather than canvas and paint, their creators clearly expect them to survive beyond the next exhibition, leaving detailed instructions of how to recreate the work, and often rebuilding it themselves (as Turner nominee Karla Black did last week with her powder and make-up creation on the floor of Tramway).

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