常見例句用作名詞 (n.)The method of application is dissolve by cold water to different concn.用冷水溶解配成不同濃度的溶液使用。The effect of immersion toxicity was gradually weakened with the increase of the extract concn.隨后隨濃度的提高浸殺效果又逐漸減弱。 返回 concn