purify quotient纯度: fineness; pureness; purity; ...系数: coefficient; ratio; modulus; ...度系数: coefficient of audibility凹度系数: concavity factor标度系数: scale factor; scalefactor; scaling ratio下载手机词典可随时随地查词查翻译关注微信公众号:chachacidian,回复:纯度系数,即可在微信中查询翻译