There is a sign of Perfect Knowledge. Man becomes silent when It is attained.

完美的知识有一种征兆，人一获得它就会变得沉默。

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Admittedly this is a difficult task and it's rare to find a buyer with perfect knowledge in this area.

这被公认是一个很难的任务，而且在这一领域具有完美的知识的采购员很稀少。

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Locke is also a probablist whereas Descartes has an ideal of perfect knowledge, absolutely incontrovertible certainty.

洛克还赞成“或然性”,而笛卡尔则有着一个理想——知识是完美的，非常坚定的理想。

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You need perfect knowledge of an impending accident, and that's what we don't have.

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Perfect knowledge and significant market influence over their own cost and demand functions.

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"It's very difficult to have perfect knowledge about who they're talking to or where they're sending stuff, " the official said.

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