Second, most firms were medium-sized and relied on a single commodity to drive profits.

第二，大多数公司规模中等，利润来源产品种类单一。

youdao

We try to lump together a set of inputs and outputs, so as to treat them as a single commodity.

我们想把一组进货和出产总加在一起，以便把它们作为单一商品对待。

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Their main concern is that Rio earned nearly 80% of its profits from a single commodity: iron ore.

他们关心的主要问题是，力拓利润的80%来自一种矿产品：铁矿石。

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He argues that African economies must move away from dependence on a single commodity.

ECONOMIST: Zambian copper

Using inedible inputs avoids fights about diverting food crops for fuel, and frees the industry from reliance on a single commodity.

ECONOMIST: America's biofuel muddle

To earn the foreign exchange needed to pay for imports and to service debts, reliance on a single commodity (like Zambia's copper) is just too risky.

ECONOMIST: Zambian copper