code: public void combine(SimpleDictionary<V> other)
      {
          if (other.trie == null)
          {
              logger.warning("有个词典还没加载");
              return;
          }
          for (Map.Entry<String, V> entry : other.trie.entrySet())
          {
              if (trie.containsKey(entry.getKey())) continue;
              trie.put(entry.getKey(), entry.getValue());
          }
      }
docs: 以我为主词典，合并一个副词典，我有的词条不会被副词典覆盖
  @param other 副词典