Scientific and technical papers : articles in printer friendly PDF format or found on the Scientific Journals web sites;

科技论文：可以轻松打印的PDF格式文章或者在一些科学期刊网站上的文章；

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Please print a copy of these contest instructions for reference before, during, and after the contest. Click here for the printer friendly version.

请打印此说明副本，用于赛前、赛中和比赛结束时参考，点击此处获取打印版本。

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Please print a copy of these contest instructions for reference before, during, and after the contest. Click here for the printer friendly version.

请打印此说明副本，用于赛前、赛中和比赛结束时参考，点击此处获取打印版本。

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