Research on optimal plan of multiply group purchase.

多目标集团采购计划优化模型的研究。

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So when we buy in group purchase, we need to take care.

所以当我们团购时，需要小心。

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John: : No matter what you say, I don't like group purchase.

约翰：不管你说什么，我就是不喜欢团购。

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John: : No matter what you say, I don't like group purchase.

约翰：不管你说什么，我就是不喜欢团购。

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