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为了取代传统的限制性版权声明，自由软件基金会于1983年制定了一份标准的 "自由版权 "文本，gnu通用公共许可证(gpl)。
to provide an alternative to traditional and restrictive copyright statements, the fsf developed in 1983 a standard "free copyright " text, the gnu general public license (gpl).
为代替传统产权，它提出了一项标准版权协定---- 《gnu通用公共许可证》，目的是阻止关闭程序的源代码，允许将其用于专有商业开发。
to replace traditional copyright, it has developed a standard copyright agreement - the gnu general public licence (gpl) - whose purpose is to deter the closing of the source code of a program with the aim of subjecting it to proprietary commercial development.