Twitter Bootstrap Carousel导航显示(Twitter Bootstrap Carousel Navigation Display)

 我只是为一个简单的Web应用程序测试了一些Twitter Bootstrap的东西，我遇到了Carousel的一个问题：导航按钮不像在bootstrap网站上的例子和我在网上找到的其他例子那样显示。 
 
 我已经把这个例子http://www.tutorialrepublic.com/codelab.php?topic=bootstrap&file=carousel并把它放到这个小提琴里http://jsfiddle.net/a5udW/ 
 
<div class="bs-example">
<div id="myCarousel" class="carousel slide">
    <!-- Carousel indicators -->
    <ol class="carousel-indicators">
        <li data-target="#myCarousel" data-slide-to="0" class="active"></li>
        <li data-target="#myCarousel" data-slide-to="1"></li>
        <li data-target="#myCarousel" data-slide-to="2"></li>
    </ol>   
    <!-- Carousel items -->
    <div class="carousel-inner">
        <div class="active item">Slide 1</div>
        <div class="item">Slide 2</div>
        <div class="item">Slide 3</div>
    </div>
    <!-- Carousel nav -->
    <a class="carousel-control left" href="#myCarousel" data-slide="prev"><</a>
    <a class="carousel-control right" href="#myCarousel" data-slide="next">></a>
</div>
 
 
 与Code Lab中的示例不同，导航按钮在较大的矩形中只是普通的旧“<”和“>”。 
 
 我做错了什么noob的事情？ 
 
 非常感谢。 

I am just testing some Twitter Bootstrap stuff out for a simple web app and I have run into an issue with the Carousel: the navigation buttons don't display like in examples on the bootstrap site and others I have found on the web.
 
I have taken this example http://www.tutorialrepublic.com/codelab.php?topic=bootstrap&file=carousel and put it into this fiddle http://jsfiddle.net/a5udW/ 
 
<div class="bs-example">
<div id="myCarousel" class="carousel slide">
    <!-- Carousel indicators -->
    <ol class="carousel-indicators">
        <li data-target="#myCarousel" data-slide-to="0" class="active"></li>
        <li data-target="#myCarousel" data-slide-to="1"></li>
        <li data-target="#myCarousel" data-slide-to="2"></li>
    </ol>   
    <!-- Carousel items -->
    <div class="carousel-inner">
        <div class="active item">Slide 1</div>
        <div class="item">Slide 2</div>
        <div class="item">Slide 3</div>
    </div>
    <!-- Carousel nav -->
    <a class="carousel-control left" href="#myCarousel" data-slide="prev"><</a>
    <a class="carousel-control right" href="#myCarousel" data-slide="next">></a>
</div>
 
 
The navigation buttons are just plain old "<" and ">" in larger rectangles unlike in the example from Code Lab.
 
What noob thing have I done wrong?
 
Many thanks.

原文：https://stackoverflow.com/questions/19827361