遞歸關系 遞推關系recursiveset: 遞歸集 遞歸集合recursivenessproblem: 遞歸性問題recursivesubranging converterr: 循環(huán)次分程轉換器recursiveness problem: 遞歸性問題recurso: 雷庫爾索下載手機詞典可隨時隨地查詞查翻譯