ass="fa fa-check"></i><b>10.3</b> apply：一般性的“拆分－应用－合并”</a></li>
<li class="chapter" data-level="10.4" data-path="apply.html"><a href="apply.html#section-10.4"><i class="fa fa-check"></i><b>10.4</b> 透视表和交叉表</a></li>
<li class="chapter" data-level="10.5" data-path="apply.html"><a href="apply.html#-7"><i class="fa fa-check"></i><b>10.5</b> 总结</a></li>
</ul></li>
<li class="chapter" data-level="11" data-path="timeSeries.html"><a href="timeSeries.html"><i class="fa