And then on to Katherine,sitting desolately,no sign of life except for her shallow breathing.

然后去凯瑟琳，头丧气地坐着，除浅弱的呼吸声外，没有一点生机。

The results show that the influences of various backings on the acoustic characteristics of anechoic coating are obviously different.

结果表明，不同背衬对吸声覆盖层吸声性能的影响具有明显不同的特性。

According to acoustic structure theory base,acoustic principle of multi-holes acoustextile and nonwovens characteristics,nonwovens acoustic theory are analysed in the paper.

根据吸声结构理论基础以及多孔吸声材料的吸声机理,结合非织造布的结构特点,系统非织造布的吸声原理。