它们决定了对一个特殊方案进行探索调查的可行性程度。
They determine the range of investigative possibilities for a particular solution.
尤其是当客户对技术不是非常精通时，他们对最终产品的期望肯能会很大程度的超出现实的成本、时间进度和可行性。
Especially when the customer isn't very technical, their vision of the final system could be vastly out of touch with the realities of cost, schedule, and feasibility.
尽管峰会光芒四射，但他们说本周的峰会在很大程度是在重申过去提出的政策，而这些政策由于可行性差而成效甚微。
For all its glitz, they say, this week's huge summit was largely a restatement of policies that have been languishing because they are unenforceable.
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