基本解释n.浓度同根派生 英汉例句用作名词 (n.)The method of application is dissolve by cold water to different concn.用冷水溶解配成不同浓度的溶液使用。The effect of immersion toxicity was gradually weakened with the increase of the extract concn.随后随浓度的提高浸杀效果又逐渐减弱。