英文: But a significant part of the data will be irrelevant to the question, so in practice this means that information is usually buried under irrelevant data and therefore almost inaccessible.

中文: 但是有很大一部份的资料将会与问题毫无干系，因此在实用上这代表：信息通常被湮没在不相干的资料中，因而几乎是无法取得的。       更详细...

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