要将内容与默认网格嵌套在一起，请在现有的.col-md- *列中添加一个新的.row和一组.col-md- *列。
您可以尝试运行以下代码以了解如何在Bootstrap中实现嵌套列-
<!DOCTYPE html> <html> <head> <title>Bootstrap Example</title> <link href="/bootstrap/css/bootstrap.min.css" rel="stylesheet"> <script src = "/scripts/jquery.min.js"></script> <script src = "/bootstrap/js/bootstrap.min.js"></script> </head> <body> <div class = "box"> <h1>Heading</h1> <div class = "row"> <div class = "col-md-3" style = "background-color: gray; color: white; box-shadow: inset 1px -1px 1px #444, inset -1px 1px 1px #444;"> <h4>Heading</h4> <p>This is demo text.</p> </div> <div class = "col-md-9" style = "background-color: gray;color: white; box-shadow: inset 1px -1px 1px #444, inset -1px 1px 1px #444;"> <h4>Heading</h4> <p>This is demo text.</p> <div class = "row"> <div class = "col-md-6" style = "background-color: orange; box-shadow: inset 1px -1px 1px #444, inset -1px 1px 1px #444;"> <p>This is box 1.</p> </div> <div class = "col-md-6" style = "background-color: orange; box-shadow: inset 1px -1px 1px #444, inset -1px 1px 1px #444;"> <p>This is box 2.</p> </div> </div> <div class = "row"> <div class = "col-md-6" style = "background-color: orange; box-shadow: inset 1px -1px 1px #444, inset -1px 1px 1px #444;"> <p>This is box 3.</p> </div> <div class = "col-md-6" style = "background-color: orange; box-shadow: inset 1px -1px 1px #444, inset -1px 1px 1px #444;"> <p>This is box 4.</p> </div> </div> </div> </div> </div> </body> </html>