<div class="col-md-9 lunbo"> 
 <div id="carousel-example-generic" class="carousel slide" data-ride="carousel" style="margin-top: 1.4285rem">  
 <!-- Indicators -->  
 <ol class="carousel-indicators" style="margin-left: -20rem">   
 <li data-target="#carousel-example-generic" data-slide-to="0" class="active">
 </li>  
 这里规定播放顺序 3个li代表3个小点 点一个小点 就是一张图   
 <li data-target="#carousel-example-generic" data-slide-to="1"></li>   
 <li data-target="#carousel-example-generic" data-slide-to="2"></li>  
 </ol>  
 <!-- Wrapper for slides -->  
 <div class="carousel-inner"> 这里是要播放的图 3张   
 <div class="item active">这里的active 对应上面active的那个小圆点    
 <img src="三组项目/PC/PC首页/lunbo1.jpg" alt="..." style="width: 64rem;height: 31.9285rem">    
 <div class="carousel-caption"></div>   
 </div>   
 <div class="item">    
 <img src="三组项目/PC/PC首页/lunbo2.jpg" alt="..."style="width: 64rem;height: 31.9285rem">    
 <div class="carousel-caption"></div>   
 </div>   
 <div class="item">    
 <img src="三组项目/PC/PC首页/lunbo3.jpg" alt="..."style="width: 64rem;height: 31.9285rem">    
 <div class="carousel-caption"></div>   
 </div>  
 </div>  
 <!-- Controls --> 这里就是那左右两个箭头  
 <a class="left carousel-control" href="#carousel-example-generic" data-slide="prev">上翻   
 <span class="glyphicon glyphicon-chevron-left"></span>  
 </a>  
 <a class="right carousel-control" href="#carousel-example-generic" data-slide="next">下翻   
 <span class="glyphicon glyphicon-chevron-right"></span>  
 </a> 
 </div>
 </div>