短語詞組短語Association -Backtracking method 聯(lián)想created by backtracking method 回溯建庫Imprecise Backtracking Method 模糊回溯法generalized backtracking method 廣義回溯方法database creation with backtracking method 回溯建庫cresting database by backtracking method 回溯建庫two -level method with backtracking 回溯二重水平法 返回 backtracking method