bootstrap navbar-static-top 菜单分成两行

我遇到了引导导航栏的问题。

我使用 navbar-static-top 制作了菜单 - 起初一切都很好。当菜单被展开并添加了一些项目时，现在随着折叠之前的宽度，它扩展到两行，看起来很糟糕。在 CSS bootstrap' 中进行了更深入的挖掘，但没有取得多大成功。请帮忙，怎么到这里？

Currently it looks like shown here:

导航栏代码：

<div class="navbar-wrapper">
  <div class="container">

    <div class="navbar navbar-inverse navbar-static-top" role="navigation">
      <div class="container">
        <div class="navbar-header">
          <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
            <span class="sr-only">Toggle navigation</span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
          </button>
          <a class="bright-logo-text navbar-brand" href="index.html">Clipboard Stripper</a>
        </div>

        <div class="navbar-collapse collapse">
          <ul class="nav navbar-nav">
            <li><a href="index.html">Home</a></li>

            <li class="dropdown">
              <a href="#" class="dropdown-toggle" data-toggle="dropdown">Features<b class="caret"></b></a>
              <ul class="dropdown-menu">
                <li><a href="features.html">Features</a></li>
                <li><a href="screenshots.html">Screenshots</a></li>
                <li class="active"><a href="usage.html">Usage</a></li>
              </ul>
            </li>


            <li><a href="features.html">Features</a></li>
            <li><a href="screenshots.html">Screenshots</a></li>
            <!--li class="active"><a href="usage.html">Usage</a></li-->
            <li><a href="download.html">Download</a></li>
            <li><a href="purchase.html">Purchase</a></li>
            <!--li class="dropdown">
              <a href="#" class="dropdown-toggle" data-toggle="dropdown">Dropdown <b class="caret"></b></a>
              <ul class="dropdown-menu">
              </ul>
            </li-->
          </ul>
          <ul class="nav navbar-nav navbar-right">
            <li><a href="contact.html">Contact</a></li>
            <li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</li>
          </ul>
        </div>
      </div>
    </div>

  </div>
</div>

我还想通过CSS来使用它，而不需要重新下载和定制Bootstrap，Skelly答案运行良好Bootstrap 3但就我而言Bootstrap 3.2CSS 发生了一些变化...这是所需的所有 CSS 的更新版本

    @media (max-width:992px){
    .navbar-header {
        float: none;
    }
    .navbar-left,.navbar-right {
        float: none !important;
    }
    .navbar-toggle {
        display: block;
    }
    .navbar-collapse {
        border-top: 1px solid transparent;
        box-shadow: inset 0 1px 0 rgba(255,255,255,0.1);
    }
    .navbar-fixed-top {
        top: 0;
        border-width: 0 0 1px;
     }
    .navbar-collapse.collapse {
        display: none!important;
    }
    .navbar-nav {
        float: none!important;
        margin-top: 7.5px;
     }
     .navbar-nav>li {
        float: none;
    }
    .navbar-nav>li>a {
        padding-top: 10px;
        padding-bottom: 10px;
    }
    .collapse.in{
        display:block !important;
    } 
}