code: public static StringDictionary combine(StringDictionary... args)
      {
          StringDictionary[] dictionaries = args.clone();
          StringDictionary mainDictionary = dictionaries[0];
          for (int i = 1; i < dictionaries.length; ++i)
          {
              mainDictionary.combine(dictionaries[i]);
          }
  
          return mainDictionary;
      }
docs: 合并词典，第一个为主词典
  @param args
  @return