Twitter bootstrap 3 为什么这十二列不'；不显示内联？

我在bootply遇到了如此奇怪的行为。我想了解为什么我有十二列网格的结果。此行为使用xs、sm、md、lg列类型运行

也许为了更了解网格系统引导3…但我一直相信12列和类型列

    <div class="container-fluid">

    <div class="row">
        <div class="col-md-2 vcenter">
            <span class="label label-primary">bla</span>
        </div>
        <div class="col-md-10 vcenter">
            <p class="textPres">Ava "fefefeef
                feeeeeeeeeeeeeeeeeeeeeeeeeeeeee
                fggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg
                gggggggggggggggggggggggggggggggggggggggggggggggg
                gggggggggggggggggggggggggggggggggggggggggggggggg
            </p>
        </div>
    </div>

</div><!-- /.container -->

布拉
Ava“fefefeefefef
感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受感受
gggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg
gggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg
gggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg

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Bootply:

我相信是

float:none

导致了这个问题。如果我删除

float:none

第一个元素（标签）将失去垂直对齐显示