“边际生产力”的英语表达是 "marginal productivity"。
“marginal”意为“边际的、边缘的”,“productivity”意为“生产力、生产率” ,二者组合准确表达了这一经济学概念。例如:The theory of marginal productivity explains how factors of production are paid according to their contribution.(边际生产力理论解释了生产要素如何根据其贡献获得报酬 。)