One is that traditional measures fail to reflect service-sector productivity growth because it has been concentrated in improved quality of services.

一是传统的衡量方法未能反映服务业生产率的增长，因为它集中在服务质量的提高上。

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As demand has increased, so manufacturers have been encouraged to diversify and improve quality.

制造商们受需求增加的刺激而扩大生产品种，提高产品质量。

《柯林斯英汉双解大词典》

The company's commitment to providing quality at a reasonable price has been vital to its success.

这家公司保证供货质优价廉的承诺对它的成功起了决定性的作用。

《牛津词典》

A spokeswoman for the mayor's office, Joanna Dovan,says the Pittsburgh area has been working to improve its air quality.

VOA: special.2009.07.13

While much agricultural research has been devoted to increasing the quality and quantity of cotton production, the USDA at the same time has been actively involved in research to find creative and profitable uses for everything else that arrives in the module.

NPR: Texas Cotton: 'Farmer Profits at Every Step'

For 40 years, Investment Quality Trends newsletter has been alerting investors to undervalued opportunities in quality stocks with historically high dividend yields.

FORBES: Magazine Article

Toyota has been trying to beef up quality controls, speed up response to defects and become more transparent.

NPR: Toyota Raises Annual Forecasts On Profit Rise