Furthermore, combining with the stability of long contract and the flexibility of spot purchasing, the model of option contract in B2B E-market is established, and the optimal solutions are discussed.

此外，期权合约在B2B电子市场的模式与稳定的长期合同和现货采购的灵活性相结合，建立和最佳的解决方案进行了讨论。

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Furthermore, combining with the stability of long contract and the flexibility of spot purchasing, the model of option contract in B2B E-market is established, and the optimal solutions are discussed.

此外，期权合约在B2B电子市场的模式与稳定的长期合同和现货采购的灵活性相结合，建立和最佳的解决方案进行了讨论。

youdao