One source of uncertainty is demand.

不确定性的一个来源是需求。

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The main source of demand is cash-rich international buyers, most of them from Latin America.

主要的需求来源是现金充裕的国际买家，他们大多来自拉美地区。

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Solar recently overtook the microchip industry as the main source of demand for silicon.

目前，太阳能超过微芯片成为硅元素的最主要需求源泉。

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Relying on a single source of U.S demand and single source of supply would be the pinnacle of economic stupidity.

FORBES: Why China Will Stop U.S. Energy Independence

Developing World Oil Demand Steadily RisingEmerging markets are almost entirely the source of this increased demand, with China accounting for 41 percent of demand growth over that time period, the IEA forecast says.

FORBES: Chinese Demand Remains The Driver Of World Oil Prices And That's Bullish

In short, what was once a source of supply is now a source of demand.

FORBES: Year of the Golden Rabbit