帮忙修改apache重写规则？

Question

尝试修改了下，失败，又急着用，请大家帮下忙！
规则在下面，要把 123123 域名 换成本地的 localhost/uc123 # 将 RewriteEngine 模式打开
RewriteEngine On
RewriteCond %{HTTP_HOST} ^123123.com [NC]
RewriteRule ^(.*)$ http://www.123123.com/$1 [L,R=301]
RewriteCond %{HTTP_HOST} ^123123.net [NC]
RewriteRule ^(.*)$ http://www.123123.com/$1 [L,R=301]
RewriteCond %{HTTP_HOST} www.123123.net [NC]
RewriteRule ^(.*)$ http://www.123123.com/$1 [L,R=301]# 修改以下语句中的 /discuz 为你的论坛目录地址，如果程序放在根目录中，请将 /discuz 修改为 /
RewriteBase /# Rewrite 系统规则请勿修改
RewriteCond %{QUERY_STRING} ^(.*)$
RewriteRule ^topic-(.+)\.html$ portal.php?mod=topic&topic=$1&%1
RewriteCond %{QUERY_STRING} ^(.*)$
RewriteRule ^article-([0-9]+)-([0-9]+)\.html$ portal.php?mod=view&aid=$1&page=$2&%1
RewriteCond %{QUERY_STRING} ^(.*)$
RewriteRule ^forum-(\w+)-([0-9]+)\.html$ forum.php?mod=forumdisplay&fid=$1&page=$2&%1
RewriteCond %{QUERY_STRING} ^(.*)$
RewriteRule ^thread-([0-9]+)-([0-9]+)-([0-9]+)\.html$ forum.php?mod=viewthread&tid=$1&extra=page\%3D$3&page=$2&%1
RewriteCond %{QUERY_STRING} ^(.*)$
RewriteRule ^group-([0-9]+)-([0-9]+)\.html$ forum.php?mod=group&fid=$1&page=$2&%1
RewriteCond %{QUERY_STRING} ^(.*)$
RewriteRule ^space-(username|uid)-(.+)\.html$ home.php?mod=space&$1=$2&%1
RewriteCond %{QUERY_STRING} ^(.*)$
RewriteRule ^([a-z]+)-(.+)\.html$ $1.php?rewrite=$2&%1