论坛里面常有&amp;amp;amp;amp;amp;amp;amp;quot;沙发&amp;amp;amp;amp;amp;amp;amp;quot;,&amp;amp;amp;amp;amp;amp;amp;quot;灌水&amp;amp;amp;amp;amp;amp;amp;quot;&amp;amp;amp;amp;amp;amp;amp;quot;BT&amp;amp;amp;amp;amp;amp;amp;quot;啊等词语,请问他们各代表什么_4