Javascript 公文包页面——如何下移到下一行

这是迄今为止完整的代码笔：

---

谢谢大家

一行的COL总数应该是12。这里有两套这样的可乐。一个全宽

col-md-12

和三个

col-md-4

。首先，将这两行分开放置。然后用三个

col-md-4

添加另一行

#projects {
  margin-top: 70px;
}

项目
正在进行的工作

太好了。当我提交问题的时候，我就以一种更复杂的方式解决了这个问题，但是是的，这要简单得多。谢谢你，我很高兴你觉得它有用。

#projects {
  margin-top: 70px;
}

<div class= "pageThree container-fluid">
    <div class= "row">
        <div class= "col-md-12" id= "protxt">   
            <h1>Projects</h1>
            <h3>Work in progress</h3>
        </div>
    </div>
    <div class= "row">
        <div class= "col-md-4 container-fluid" id= "projects">
            <a href= "http://www.freecodecamp.com/map#">
                <img src= "https://s3.amazonaws.com/freecodecamp/wide-social-banner.png"     class= "img-responsive">
            </a>
        </div>
        <div class= "col-md-4 container-fluid" id= "projects">
            <a href= "http://i.imgur.com/dLx8nrg.jpg">
                <img src= "http://i.imgur.com/dLx8nrg.jpg" class= "img-responsive">
            </a>
        </div>
        <div class= "col-md-4 container-fluid" id= "projects">
            <a href= "http://www.epicodus.com/">
                <img src= "http://static1.squarespace.com/static/5524448ee4b0d6f6b83ab9e2/t/55244514e4b08a    d5c0f51a01/1450291270689/?format=1500w" class= "img-responsive">
            </a>
        </div>
    </div>
    <div class= "row">
        <div class= "col-md-4 container-fluid" id= "projects">
            <a href= "http://www.freecodecamp.com/map#">
                <img src= "https://s3.amazonaws.com/freecodecamp/wide-social-banner.png"     class= "img-responsive">
            </a>
        </div>
        <div class= "col-md-4 container-fluid" id= "projects">
            <a href= "http://i.imgur.com/dLx8nrg.jpg">
                <img src= "http://i.imgur.com/dLx8nrg.jpg" class= "img-responsive">
            </a>
        </div>
        <div class= "col-md-4 container-fluid" id= "projects">
            <a href= "http://www.epicodus.com/">
                <img src= "http://static1.squarespace.com/static/5524448ee4b0d6f6b83ab9e2/t/55244514e4b08a    d5c0f51a01/1450291270689/?format=1500w" class= "img-responsive">
            </a>
        </div>
    </div>
</div>