Full function PDF specification means that it is not only a subset of Adobe PDF specification; in the case of ISO 32000-1 the full function PDF includes everything defined in Adobe's PDF 1.7 specification.
全功能PDF规格意味着不仅仅是Adobe PDF规格的子集；就ISO 32000-1而言全功能PDF包含了Adobe的PDF 1.7规格定义的每一条。