According to the characteristics of the polymer dispersed liquid crystal materials, it is necessary to design special power driving supply system for the devices based on H-PDLC element.

根据聚合物分散液晶材料的光电特性及需要，在研究基于聚合物分散液晶光电器件时必须设计合适的电源驱动系统。

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Saudi Arabia, the OPEC member nation with the world's largest reserves, has cut back on some of its production, thereby limiting supply and driving up prices, according to OPEC critics.

据欧佩克的批评者所说，全球石油蕴藏量最大的国家、欧佩克成员沙特阿拉伯已经削减了一些石油产量，从而导致供应受限和油价攀升。

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We need to look at the fundamental factors driving food prices: demand and supply.

我们必须看到操纵粮价的基本因素：需求与供给。

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Gas prices should adjust because of a change in the forces driving the underlying supply of or demand for oil, not because stock prices are at a historic high.

FORBES: Why Gas Prices Are Rising . . . Again!

The global shortage of cotton led to a speculation that the cotton prices would rise further resulting in hoarding by traders creating an artificial short-supply and driving the prices up in the futures market.

FORBES: King Cotton Getting Cheaper Would Send Aeropostale To $36

Fundamentals are the driving factor this time: supply is tight and demand is growing.

FORBES: Magazine Article