What is striking to us, however, is the extent to which a materialist or economic interpretation of history has essentially transformed itself into social history. 然而我们要做的是，唯物论者或历史的经济解释在何种程度上本质地改变着自身并决定着社会的历史。
And politicians tend to favor parochial interests over sound economic sense. 政客们往往将狭隘的利益凌驾于可靠的经济意义之上。
Then, give the economic significance and calculational methods of these four kinds calculational methods. 然后，重点介绍了四种类型的技术进步贡献的经济意义及计算方法。
