However, as the main member of the market, the futures broker companies are still facing the following problem: single-crop farming and simple way of profit-making.

但作为期货市场的主要主体的期货经纪公司仍存在着业务模式单一、赢利方式简单的问题。

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But experts asid no single crop will revolutionize farming in Africa. Because farmers there grow a mixture of different crops.

但是专家表示没有一种单一的农作物可以给非洲农业带来根本性的变化，因为那里的农民混合种植不同的农作物。

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But experts say no single crop will revolutionize farming in Africa because farmer there grow a mixture of different crops.

但是专家表示没有一种单一的农作物可以给非洲农业带来根本性的变化，因为那里的农民混合种植不同的农作物。

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