其次，我们在2000年发现一个强大的要求，它是专业文章的检索和医生或者研究员想知道的，而且当时丁香园是唯一有这样功能的网站。

Second, I think we found a strong request in 2000, which was academic article retrieving and many physicians or researchers wanted to know this and DXY was the only one website for this at that time.

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