1989年，蒂姆·伯纳斯·李发明了万维网，这完全是他自己发明的。

In 1989, Tim Berners Lee invented the World Wide Web all by himself.

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如果没有蒂姆·伯纳斯·李，也许今天你就看不到这篇文章了。

If it weren't for Tim Berners-Lee, you would not be able to read this article.

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当一位叫蒂姆·伯纳斯-李的英国科学家发明了万维网时，那种情况在1991年改变了。

That changed in 1991, when a British scientist named Tim Berners-Lee invented the World Wide Web.

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