progression
习惯用语in progression1.■连续, 相继mode of progression1.■步法, 游法特殊用法arithmetic progression1.■算术级数, 等 差级数band progression1.■谱带级continuous progression1.■连续[随时]升级制decimal progression1.■十进级数decreasing progression1.■递减级数finite progression1.■有限级数geometric progression1.■几何[等比]级数harmonic progression1.■调和级数[数列]hypergeometrical progression1.■超几何级数increasing progression1.■渐增加[递增]级数infinitive progression1.■无穷级数stall progression1.■失速区的扩大progression of succession1.■【生态】进展演替