新规则将期货交易委员会对公司在农业合约中可持股种类的限制扩大至28种其他商品，包括石油、黄金以及银。

The new rules extend the commission's existing limits on positions that firms can hold in agricultural contracts to 28 other commodities, including oil, gold and silver.

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例如按期货合约交割商品时，持仓费包括商品抽样费，称重费及维修费等。

For example, when fulfilling the terms of a futures contract, the carrying charges include charges for sampling, weighting and damage repairmen ect.

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