system EMC系统电磁兼容性systemn.系统；体系；身体；制度System Call Sequence系统调用序列system interrogation系统询问system of orthograph正字法系统system of coordinate点目标system power control系统电源控制器system consciousness系统意识system expandability系统可扩充性system self-memory系统自记忆system of literature文学体制system documentation系统文件编制