From these two paintings:
http://en.wikipedia.org/wiki/File:Repin_Cossacks.jpg
http://en.wikipedia.org/wiki/File:Kurskaya_korennaya.jpg
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http://en.wikipedia.org/wiki/File:Repin_Cossacks.jpg
http://en.wikipedia.org/wiki/File:Kurskaya_korennaya.jpg
请阅读更多我的博客文章>>>