Warning: file_put_contents(/www/wwwroot/ppbbu/cp667.com/cache/351b08ac8609d5e1ae60b44ceb10b713.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/cp667.com/index.php on line 55 Ponser是什么意思，Ponser的翻译，Ponser音标、读音、用法和例句_淳朴汉英词典
William M. Landes , Richard A. Ponser , Trademark Law : An Economic Perspective , 30 Journal of Law and Economics 265 （1987） . 邊際成本是中經常提到的概唸;它是指每一個單元成本;該成本代表了每生産一個額外單元的産品所增加的必要成本.