The substance of the patent system in fact is a social contract signed between the patent owner and the nation, while the patent document is the contract itself.
就其本质而言，专利制度的实际是专利权人与国家签署的一项社会契约，而专利文件就是这份契约本身。
In fact, the meaning of sign System is largely beyond the road sign itself, and it also shows the cultural identity of new public space from different perspectives on the social dimension.
实际上，标识系统的社会功能不仅仅是“路牌”的作用，它的意义远远超越了其本身的基本功能，而且具有从多角度社会层面表现新型公共空间文化属性的作用。
However, due to various obstacles to the system, our country has not set up for migrant workers social security system, migrant workers has become a matter of fact the edge of the city's population.
但由于种种制度障碍，我国还没有建立起针对农民工的社会保障制度，农民工事实上已成为城市的边缘群体。
However, due to various obstacles to the system, our country has not set up for migrant workers social security system, migrant workers has become a matter of fact the edge of the city's population.
但由于种种制度障碍，我国还没有建立起针对农民工的社会保障制度，农民工事实上已成为城市的边缘群体。
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