bootstrap div没缩小窗口处于右侧 缩小窗口后处于内容中间（第二张图片的导航内容在居中）

Question

<div class="container">
<div class="row">    
<nav class="navbar navbar-default" role="navigation">
    <div class="container-fluid"> 
    <div class="navbar-header">
        <button type="button" class="navbar-toggle" data-toggle="collapse"
                data-target="#example-navbar-collapse">
            <span class="sr-only">切换导航</span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
        </button>
        <img src="muia/images/logo.png" >
    </div>
    <div class="collapse navbar-collapse " id="example-navbar-collapse">
        <ul class="nav navbar-nav pull-right">
            <li><a href="#">首页</a></li>
            <li><a href="#">分栏一</a></li>
            <li><a href="#">分栏二</a></li>
            <li><a href="#">分栏三</a></li>
            <li><a href="#">分栏四</a></li>
        </ul>
    </div>
    </div>
</nav>
</div>
</div>