源代码:
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Wfuyu教程(wfuyu.com)</title> <style> p { background-color:yellow; } p.margin { margin-top:100px; margin-bottom:100px; margin-right:50px; margin-left:50px; } </style> </head> <body> <p>This is a paragraph with no specified margins.</p> <p class="margin">This is a paragraph with specified margins.</p> </body> </html>
运行结果：