<meta name="author" content="Chris Mills">
<meta name="description" content="The MDN Learning Area aims to provide
complete beginners to the Web with all they need to know to get
started with developing web sites and applications.">
许多 <meta> 特性已经不再使用：
因为作弊者填充了大量关键词到keyword， 错误地引导搜索结果<meta name="keywords" content="fill, in, your, keywords, here"
