The key is the interaction between the two sources of knowledge.

关键之处在于知识两大来源间的相互作用。

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Both science and poetry, then, provide different but valid sources of knowledge.

所以，科学与诗歌两者都提供了不同却有效的知识源泉。

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Living in the Internet age is a great blessing because there are abundant sources of knowledge available.

生活在互联网时代的人们是幸运的，有大量的知识资源可以利用。

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Innovations usually consist of some form of recombination of other, existing sources of knowledge.

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They turn to other sources of knowledge, such as consulting firms, instead.

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Finally, the successful inventors had always maintained clear ties to sources of scientific knowledge in the public domain, by collaborating with university scientists, reading scientific publications, and so on.

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