Second, there is not coal futures market as the helpful complementary market.

其次，没有煤炭期货市场作为有益的补充。

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There is a market only products, which is a complementary relationship.

有市场唯一的产品，这是一种相辅相成的关系。

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There is a market only products, which is a complementary relationship.

有市场唯一的产品，这是一种相辅相成的关系。

youdao