what the diffrance between those

can anyone tell me what the the difference between those

.inner h2

ul.features

Code (markup):

 

means this css will be applicable for h2 elements:
- which has parent node with class name "inner".

means this css will be applicable for all ul elements:
- which has class name "features".

 

thx for ur replay
and i think for example the h2 elements the html will be like this

<div class="inner">
<h2>judge</h2>
<h2>judge<h2>
</div>

Code (markup):

and this apply for any h2 nested in div

for features must be like this

<ul class="features">

Code (markup):

 

yes... exactly

 

if this my html

<div class="inner">
<h2>Recent Features</h2>
<ul class="features">
<li>
<h3><a href="">Head for the Hills: Is Altitude Training the
Answer?</A></h3>
<p>Lachlan 'Super Toe' Donald</p>
<p>Vestibulum ante ipsum primis in faucibus orci luctus etultrices posuere cubilia Curae; Praesent hendrerit
iaculis arcu.</p>
<p><a href="">Full Story</a></p>
</li>
<li
>
<h3><A href="">Hack up the Place: Freestylin' Super Tips</a></h3>
<p>Jules 'Pony King' Szemere</p>
<p>Vestibulum ante ipsum primis in faucibus orci luctus et
ultrices posuere cubilia Curae; Praesent hendrerit
iaculis arcu.</p>
<p><a href="">Full Story</a></p>
</li>
<li
>
<h3><A href="">The Complete Black Hat Hacker's Survival Guide</A></h3>
<p>Mark 'Steel Tip' Harbottle</p>
<p>Vestibulum ante ipsum primis in faucibus orci luctus et
ultrices posuere cubilia Curae; Praesent hendrerit
iaculis arcu.</p>
<p><a href="">Full Story</a></p>
</li>
<li
>
<h3><A href="">Five Tricks You Didn't Even Know You Knew</A></h3>
<p>Simon 'Mack Daddy' Mackie</p>
<p>Vestibulum ante ipsum primis in faucibus orci luctus et
ultrices posuere cubilia Curae; Praesent hendrerit
iaculis arcu.</p>
<p><a href="">Full Story</a></p>
</li>
</ul>
</div>

Code (markup):

and i want style the link headings
i style it by

.inner h3 a:link {underline:none
                                 ....}
or
.features h3 a:link{underline: none
                         .......}

Code (markup):

 

what about the another difference

.features li img

Code (markup):

sorry i know i ask very primitive questions

 

the css will be applicable for images, which has parent node li, and the li node has parent node with class name .features

example:

<div class="features">
  <li><img src="images/someimage.gif" width="32" height="32"></li>
</div>

HTML: