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。
2
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。
3
By most measures, San Jose is no longer a place where low income, or even middle income families, can afford to live.