youdao

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

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。

youdao

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