In some cases, development of a schema for a particular information set might not be required, useful, or even possible without a prohibitive amount of work.

有时，为一个特殊信息集合开发模式可能没有必要而且没什么用，或者因为工作量巨大而变得不可能。

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High taxation on payrolls and a prohibitive amount of bureaucracy are just some of the hurdles that face any foreign company trying to break into the market.

WSJ: Brazil: The Social Media Capital of the Universe

With the overwhelming amount of ESI increasing at record rates, per-gigabyte pricing quickly becomes prohibitive.

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