代码HTML <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><meta name="ms.locale" content="zh-cn" /><meta name="MN" content="955-8:15:28" /><meta name="Title" content="SQL Server 开发中心" /><meta name="Search.Title" content="SQL Server 开发中心" /><meta name="Search.MScategory" content="aa336270" /><meta name="MSHAttr" content="MScategory:aa336270" /><meta name="Search.MScategory" content="aa336270" /><meta name="MSHAttr" content="ShippedIn:MSDN.10" /><meta name="Search.ShippedIn" content="MSDN10" /><meta name="MSHAttr" content="OnlineHelp:VS2005" /><meta name="Search.OnlineHelp" content="VS2005" /><meta name="Search.ShortId" content="aa336270" /> <meta>标记是什么意思?