wordpress侧边栏怎么调用的文章列表，看了很久一直不能理解

<div id="primary" class="sidebar grid_5 pull_10">	<ul class="">	<?php if ( is_active_sidebar( 'sidebartop' ) ) : ?>        <?php dynamic_sidebar( 'sidebartop' ); ?>	<?php endif; // end primary sidebar widgets  ?>	</ul>	</div><!-- #primary .sidebar --><div id="secondary" class="sidebar grid_5 pull_10">	<ul class="">	<?php if ( is_active_sidebar( 'sidebarbottom' ) ) : ?>        <?php dynamic_sidebar( 'sidebarbottom' ); ?>	<?php endif; // end secondary sidebar widgets  ?>	</ul>    </div><!-- #secondary .sidebar -->

register_sidebar(array(		'name' => 'SidebarTop',		'description' => 'Top sidebar',		'id'            => 'sidebartop',		'before_widget'  =>   "\n\t\t\t" . '<li id="%1$s" class="widget %2$s"><div class="widgetblock">',		'after_widget'   =>   "\n\t\t\t</div></li>\n",		'before_title'   =>   "\n\t\t\t\t". '<div class="widgettitleb"><h3 class="widgettitle">',		'after_title'    =>   "</h3></div>\n" .''		));