After investigating and making surveys in beijing and in guizhou province , the author concludes that the two cores of sustainable development for rural tourism are rural tourism localization and “ dividing ” ; rural tourism localization may occur in two ways . the first is rural tourism industry - chain localization and the other is rural tourism runners in accrete harmony 通过对北京和贵州两地乡村旅游的实际调研和问卷调查,作者提出了乡村旅游可持续发展的核心举措是乡村旅游的本土化和“分” ,实现本土化的两个重要途径:产业链本地化和经营者共生化。
Matter will be transferred from the red giant to the white dwarf when the gravity of the red giant at its surface is weaker than that of the white dwarf . when sufficient matter is accreted onto the surface of the white dwarf , nuclear reactions will start and sustain for a short period on the white dwarf surface . enormous energy is produced 当红巨星的表面引力比白矮星弱时，部分物质会盘旋流进白矮星内，当足够的物质积聚在白矮星表面，便会燃点起热核反应，产生出巨大的能量，这种爆发会维持下去，直至所有氢气耗尽。
