It is indicated that the voltage was induced in the films when the rotational electrolytes flow on the carbon nanotube films surface due to electronic friction and electron drag effect.

结果发现，当转动电解液从碳纳米管膜的表面流过时，也会在膜的两端诱导出电势，该电势的大小与电解液的种类、转速、质量浓度和温度等有关。

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This means that some people have become higher rate taxpayers even if their wages only rose in line with inflation, an effect known as fiscal drag.

BBC: Budget 2013: Tax changes 'will benefit millions'

In remarks a few weeks ago, Fed Chairman Ben Bernanke expressed concerns about the austerity measures being undertaken in European countries, worried that they would have a negative effect on European economies going forward and would act as a drag on the global recovery.

FORBES: Stock Market At Odds With Central Banks In U.K., U.S.

And that has an uncertain effect on returns--it's obviously very helpful in bad markets and is a drag in good markets--but the beauty of it is that it reduces your impulsive behavior.

FORBES: Intelligent Investing Briefing Book