At present, the supply chain system gradually constitutes a complex network. Consequently, it can be well studied based on the complex network theory.

目前，供应链系统呈现出一种复杂网状结构，可以借助复杂网络理论对其进行研究。

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Kevin Morgan, a professor at Cardiff University and the author of The School Food Revolution, a book about the supply chain behind cafeteria food, said the supply network was complex and should be better regulated.

BBC: Horsemeat: 'Food fraud' not put health at risk, says expert