向下兼容性 meaning in Chinese

downward compatibility

Deliver backwards compatibility with previous releases of components , templates , modules and other extensions
提供对之前发行版中组件、模板、触发器及其它扩展的向下兼容性。
It is programmed with modular construction and by dominated exploiting tool , that it is comprising and convenient to be extended and grafted
软件编制采用模块化结构及主流开发软件，具有较好的向下兼容性、可扩充性和可移植性。