Discuz 门户RSS源正文输出问题

Question

请问一下：
Discuz!门户rss地址和相关文件 /source/module/portal/portal_rss.php

可以输出文章描述，请问如何输出正文内容？

            echo    "    <item>\n".

                "      <title>".$article['subject']."</title>\n".

                "      <link>$_G[siteurl]".($rewriteflag ? rewriteoutput('portal_article', 1, '', $article[aid]) : "portal.php?mod=view&amp;aid=$article[aid]")."</link>\n".

                "      <description><![CDATA[".dhtmlspecialchars($article['description'])."]]></description>\n".

                "      <category>".dhtmlspecialchars($article['catname'])."</category>\n".

                "      <author>".dhtmlspecialchars($article['author'])."</author>\n".

                ($attachfile ? '<enclosure url="'.$filename.'" length="'.$attachsize.'" type="image/jpeg" />'."\n" : '').

                "      <pubDate>".gmdate('r', $article['dateline'])."</pubDate>\n".

                "    </item>\n";