<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
    <div class="modal-dialog modal-lg">
        <div class="modal-content">
            <div class="modal-header">
                <button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>
                <h4 class="modal-title" id="myModalLabel">Modal</h4>
            </div>
            <div class="modal-body">
                <div class="row">
                    <div class="row-md-6">
                        Left
                    </div>
                    <div class="row-md-6">
                        Right
                    </div>
                </div>
 
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
                <button type="button" class="btn btn-primary">Save changes</button>
            </div>
        </div>
    </div>
</div>

我发现一些事情解决了Bootstrap 2的这个问题，但是它们不适用于Bootstrap 3.我也尝试将行md-6更改为sm，xs等，但没有运气。在Bootstrap 3中可以做到这一点吗？专栏对我而言是最理想的选择，但是我应该尽量避免列