title: Can I combine pseudo-classes in CSS like this?
body: <p><strong>HTML:</strong></p>
  
  <pre><code>&lt;table&gt;
  &lt;tr class="not-counted"&gt;&lt;th&gt;Heading 1&lt;/th&gt;&lt;/tr&gt;
  &lt;tr&gt;&lt;td&gt;key1&lt;/td&gt;&lt;td&gt;val1&lt;/td&gt;&lt;/tr&gt;
  &lt;tr&gt;&lt;td&gt;key2&lt;/td&gt;&lt;td&gt;val2&lt;/td&gt;&lt;/tr&gt;
  &lt;tr class="not-counted"&gt;&lt;th&gt;Heading 2&lt;/th&gt;&lt;/tr&gt;
  &lt;tr&gt;&lt;td&gt;key3&lt;/td&gt;&lt;td&gt;val3&lt;/td&gt;&lt;/tr&gt;
  &lt;/table&gt;​
  </code></pre>
  
  <p><strong>CSS style:</strong></p>
  
  <pre><code>table tr:not(.not-counted):nth-child(even) td {
      background-color: gray;
  }​
  </code></pre>
  
  <p><strong>Demo:</strong> <a href="http://jsfiddle.net/MartyIX/fdtpL/" rel="nofollow">http://jsfiddle.net/MartyIX/fdtpL/</a></p>
  
  <p>I hoped that TR containing key3 would have grey background too but it does not work. How to write the CSS properly?</p>
  
  <p>Thanks!</p>