t list">
          <li>
            <a href="javascript:;" name="training__section__expand" class="expanded--hidden"><span class="icon icon-expand_more"></span> {{ _('expand') }}</a>
            <a href="javascript:;" name="training__section__collapse" class="collapsed--hidden"><span class="icon icon-expand_less"></span> {{ _('collapse') }}</a>
          </li>
          <!--
          TODO(twd2): twd2 todo
          <li>
            递交了 ? 次完成该章节 (TOP ?%)
          </li>
          <li>
    