以三次产业划分国民经济活动是产业结构研究中最重要的分类法之一。一般地说,第一次产业包括:农业(指种植业)、畜牧业、林业和狩猎业等;第二次产业包括:{采矿业}、制造业、建筑业、{煤气、电力、供水}等工业部门;第三次产业包括:商业、金融及保险业、{运输业}、服务业、公务、{其他公益事业}和其他各项事业(其中有{}符号的,是在三个产业的归属问题上有争议的行业)。世 Dividing the national economy activities by three industries is one of the most important taxonomies in the study of industrial structure. In general, the first industries include agriculture (farming), livestock husbandry, forestry and hunting; the second includes: {mining}, manufacturing, construction, {gas, electricity, water supply} And other industrial sectors; the third industry includes: business, finance and insurance, {transport industry}, services, public service, {other public service} and other various businesses (among them, the symbol {} is in three industries Controversial issues on the ownership of the industry). world