<div class="media">
  <div class="media-left">
    <a href=http://www.mamicode.com/"#">
      <img class="media-object" src=http://www.mamicode.com/"..." alt="...">
    </a>
  </div>
  <div class="media-body">
    <h4 class="media-heading">Media heading</h4>
    ...
  </div>
</div>

媒体对象