<div class="box gold left"> <p>我设置了float:left;width:200px;</p> </div> <div class="box blue nobfc"> <p>我没有设置浮动,也没有触发BFC,width:300px;</p> </div>
.box{ border:1px solid #9a9a9a; } .gold{ background-color:gold; } .blue{ background-color:lightblue; } .bfc{ overflow:hidden; *zoom:1; } .left{ float:left; width:200px; } .nobfc{ width:300px; border: }