我已经根据标记化句子中的1-gram、2-gram、3-gram提取关键字list_of_keywords=[]foriinrange(0,len(stemmed_words)):temp=[]forjinrange(0,len(stemmed_words[i])):temp.append([''.join(x)forxinlist(everygrams(stemmed_words[i][j],1,3))if''.join(x)inset(New_vocabulary_list)])list_of_keywords.append(temp)我已经获得关键字列表为['blood','pr