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. 然而我們要做的是，唯物論者或歷史的經濟解釋在何種程度上本質地改變著自身並決定著社會的歷史。
And politicians tend to favor parochial interests over sound economic sense. 政客們往往將狹隘的利益凌駕於可靠的經濟意義之上。
Then, give the economic significance and calculational methods of these four kinds calculational methods. 然後，重點介紹了四種類型的技術進步貢獻的經濟意義及計算方法。
