This is more likely to happen when the information is sensitive or of unknown value.

这在信息比较敏感或者具有未知的价值时更容易发生。

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In the prediction stage, the unknown value of a new case can be estimated by retrieving and computing the same "class" of records.

该方法认为数据间相似的一组数值即是一“类”，在预测阶段通过查找与新案例同“类”的记录来估计未知数值。

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Then, whenever we have a new data point, with an unknown output value, we put it through the model and produce our expected output.

之后，只要我们有一个输出值未知的新的数据点，我们都可以将其放入这个模型并生成预期的输出。

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Difficulties that everyday citizens (and voters) have with evaluating the merits of the most well-known financial services firms are multiplied when the challenge is to form a judgement on the long-term value provided by unknown, entrepreneurial firms who engage in financial transactions that are far removed from their own everyday lives.

FORBES: "Villains" of Financial Crisis Wrestle with Misperceptions

The value to mammoths of having two coat colours is unknown.

ECONOMIST: The genetics of mammoth coat colour

But if Apple cuts its profit margins to do it then jobs (some number, unknown) will disappear somewhere else as a result of the reduction in those profits and the value of Apple as a company.

FORBES: If Apple Onshored iPad Production it Would Create 67,000 American Manufacturing Jobs!