你必须有渊博的现实交易知识。

You must have extensive knowledge prior to engage in real trading.

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考虑现实交易情形，建立带有交易费用的组合套期保值策略模型，并对其进行研究及求解。

Thinking of the real condition of the future transaction, we present the model of combination hedge with transaction cost, and study on them and give approach to seek their equilibriums.

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