Unlike oil, gold and other commodities, carbon credits have no existence outside the registries' databanks.

与石油、黄金和其它大宗商品不同，碳信用额并不在登记所数据库以外存在。

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Unlike pricing of other commodities, iron ore's price is hammered out in top-secret annual meetings between miners and their customers rather than on international exchanges.

与其他大宗商品的定价方法不同，铁矿石价格是在每年矿业公司与客户秘密进行的会议上敲定的，而不是通过国际交易所定价。

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Unlike other commodities, tea is bought at weekly auctions in different countries or by private agreement.

BBC: Darjeeling tea growers at risk

Unlike other commodities, uranium itself does not trade on any exchanges.

ECONOMIST: Uranium

Unlike all other commodities, with a century or more of history, commercial uranium consumption is barely two decades old.

FORBES: Yellowcake Fever