请问这两句什么意思啊

<!--图片资讯-->
<!--{block name="spacenews" parameter="grade/5/haveattach/1/showattach/1/order/i.lastpost DESC/subjectlen/12/subjectdot/1/limit/0,4/cachetime/8000/cachename/picnews/tpl/data"}-->
               


<!--{block name="spacenews" parameter="grade/3,4,5/order/i.dateline DESC/limit/0,16/cachetime/900/subjectlen/40/subjectdot/1/cachename/newslist/tpl/data"}-->

模板调用的字段啊((em:12))