attenuation constant短语¹⁴⁴⁹⁷²⁺² 基本例句 减幅常数,衰减常数 There is a heavy attenuation property and there exist sensitive relationships of increase function between attenuation constant and frequency, porosity, osmotic coefficient; 具有强衰减性，衰减系数与频率、孔隙度和渗透系数间存在敏感的增函数关系； http://dict.cnki.net