The result shows that average absorption coefficient and noise reduction coefficient separately equal to0.58and0.60 and fine property of sound absorption at middle-low frequency.

结果表明材料的平均吸声系数和降噪系数分别达0。58和0。60，且材料的中低频吸声性能优良。

youdao

The distribution configuration of middle-low mountain soil quality mainly depends on the variations between land use and cover, and human activities is the main factor that enhances the variations.

中低山坡地土壤质量的变化特征主要依赖于土地利用与覆盖之间的差异。

youdao

By most measures, San Jose is no longer a place where low income, or even middle income families, can afford to live.

从大多数方面来看，圣何塞不再是低收入乃至中等收入家庭能住得起的地方了。

youdao

It found that ninety-seven percent happen in low and middle income countries.

VOA: special.2009.09.28

About 40 percent of households in this mostly African-American, low-to-middle income neighborhood don't have access to a car.

VOA: standard.2010.07.28

In addition to looking at personal characteristics such as age and relationship status, the researchers divided the countries into high- and middle-to-low income groups according to average household earnings.

CNN: People in affluent nations may be more depression-prone

The additional revenue generated from a responsible estate tax would reduce the deficit reduction pain that would otherwise will fall on middle- and low-income households.

FORBES: Warren Buffett And George Soros Want Higher Estate Tax Than Obama Proposes

"For advanced countries, more imports today are coming from middle- and low-income countries, " says Matthew Slaughter of Dartmouth's Tuck School of Business, a former Bush White House adviser.

WSJ: China Trade Rise Prompts Shifts Around the Globe