bootstrap社交媒体按钮，只在移动版上显示？

Question

这是我的代码，社交媒体链接不会出现在桌面视图中。我该如何更改它以便它们出现在任何屏幕尺寸上？

<footer>
        <div class="container">
            <div class="row">
                <div class="col-md-4">
                    <span class="copyright">Copyright &copy; Your Website 2014</span>
                </div>
                <div class="col-md-4">
                    <ul class="list-inline social-buttons">
                        <li><a href="#"><i class="fa fa-twitter"></i></a>
                        </li>
                        <li><a href="#"><i class="fa fa-facebook"></i></a>
                        </li>
                        <li><a href="#"><i class="fa fa-linkedin"></i></a>
                        </li>
                    </ul>
                </div>
                <div class="col-md-4">
                    <ul class="list-inline quicklinks">
                        <li><a href="#">Privacy Policy</a>
                        </li>
                        <li><a href="#">Terms of Use</a>
                        </li>
                    </ul>
                </div>
            </div>
        </div>
    </footer>