bootstrap嵌套列

<div class="container">
    <div class="row">
      <div class="col-md-8"><img ></div>
      <div class="col-md-4">
        <div class="row">
            <div class="col-md-12">.col-md-</div>
            <div class="col-md-12">.col-md-</div>
            <div class="col-md-12">.col-md-</div>
        </div>
      </div>
    </div>
</div>