织梦调用栏目和字栏目文章如何限制字符和数量

{dede:channelartlist row=6}

<dl>

<dt><a href='{dede:field name='typeurl'/}'>{dede:field name='typename'/}</a></dt>

<dd>

{dede:arclist titlelen='42' row='10'} <ul class='autod'>

<li><a href="[field:arcurl /]">[field:title /]</a></li>

<li>([field:pubdate function="MyDate('m-d',@me)"/])</li>

</ul>

{/dede:arclist}

</dl>

{/dede:channelartlist}