经济投资的英文：
economic imvestment
adj. 经济上的；经济学的
an economical shopper;
精打细算的购物者;
economic planning
制订经济计划
Economics is the base and politics is the concentrated expression of economics
经济是基础，政治则是经济的集中表现。
economics of different sectors and economics ofspecialized fields
部门经济学和专业经济学