Wear resistance is a key index of quality for roller chain.

滚子链耐磨性能是链条产品一项重要的质量指标。

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Total copper content in HDE is one important index of quality.

总铜量是HDE的一个重要的质量指标。

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Conclusion: the active components of HangJinju decoctions can be used as the index of quality control.

结论：黄金菊汤剂中4种药效组分可作为其质量控制的科学指标。

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Dr.Kausalya Pendyal tells her patients in Richmond, Virginia before they go outside to check the Air Quality Index - a U.S.government assessment of pollutants in the air.

VOA: standard.2010.08.04

Using the recent discussion of the United Nations Human Development Index (HDI), which relates quality of life with access to energy ( The Middle Class, Energy And Terrorism), we can speculate as to whether Egypt will be better off after the Arab Spring than before it.

FORBES: The Arab Spring -- Energy And The Road To Democracy?

While air pollution has remained a nagging problem since then, Beijingers have learned to live with the situation, and there have been enough blue sky days in the capital city to keep the Air Quality Index (AQI) out of the news until last week that is.

FORBES: Air Quality In China

This allows price rises due only to higher quality to be knocked out of the index.

ECONOMIST: Fighting America��s inflation flab