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The only source of knowledge is experience.

  • -- Albert Einstein 爱因斯坦

知识的唯一来源是经验。

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Readership was high, and very attentive. It wa attentives people's only source of knowledge about the world.

读者群很高，也很专注。它是人们了解世界的唯一来源。

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The closer the source of light is to a subject, the broader the beams are.

光源离物体越近，光束就越宽。

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