“子系统”用英语怎么说

在每一种职能范围内,包含有一定数量的系统和子系统.Each functional area has within it a number of systems and subsystems.宏观评价以各子系统为评价单元,采用模糊综合评价法.Macrocosmic evaluation takes subsystem as evaluation cell and adopts Fuzzy Comprehensive Evaluation....