what is specialization?how do specialization produce surplus

What is vertical specialization and what is horizontal speci generalization and specialization which is better? field of specialization是什么意思 Explain the role of cell specialization in the development o 分析一个考研句子为何Affecting修饰development而不是specialization 该如何判断啊 But 细胞分化（differentiation）与特化（specialization）分别是什么?它们之间的关系是什么? 用英语解释以下词语,1,boat country;2,FOB;3,specialization 4,a sight dr 问一道四级阅读题?But in the long run to much specialization doesn't How is the water?What do we use water to do?What can we do t How do you understand “multiculturalism”? What is the advant how is it different from what you do?的意思. What is Global Warming and how do deal with it?