[统计] 分组频率级数 series classification: 连续分级; 顺序分类frequency series: 次数数列; 频率级数; 频率序列; 频数数列series classification of soil: 系列土壤分类radio frequency classification: 射频分类statistics of classification frequency: 分组频率统计下载手机词典可随时随地查词查翻译