In American society, however, the class structure was less rigid; some people changed occupations easily and believed it was their duty to improve their social and economic position.

然而，在美国社会，阶级结构没有那么严格；有些人很轻易地就改变了职业，并认为提高他们的社会和经济地位是他们自己的责任。

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This paper introduces the structure and economic benefit of the electric boiler heat reservoir, points out the obvious economic and social benefit of this technology.

介绍了电锅炉蓄热装置的结构和经济利益，指出了该技术具有明显的经济效益和社会效益。

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Spatial structure indicates the degrees and forms of spatial agglomeration caused by the interaction of social economic entities.

空间结构是社会经济客体在空间中的相互作用及所形成的空间集聚程度和集聚形态。

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Northwestern Europe's new social and economic structure consigned the vast majority of the population to miserably impoverished lives.

FORBES: Magazine Article

Both came to Washington full of rhetorical energy about the changes to be wrought in the social and economic structure of the nation.

CNN: By Ronald D. Elving, CQ Staff Writer

By transforming the social structure through economic alliances, corporations and their partners in government and the nonprofit sector may be able to promote social change through aggressive corporate philanthropy and citizenship.

FORBES: For the 21st Century, a Network of Beneficial Philanthropy and Corporate Citizenship