How to avoid automatic word wrapping

Dear list,

I am working on a website based on the Website DTD. On some pages I have 
  list with entries like this

         <row valign="top">
           <entry>
               14:15 - 15:00
           </entry>
           <entry>
               Impulsvortrag
           </entry>
         </row>

My question is now: How can I avoid line breaks in the first entry?

Regards,

Oliver Fischer