The twice-cooked method is redundant, makes your web pages invalid, and doesn't include a mechanism for inserting alternative content.
两次烹饪法显得冗余，并且使你的网页不标准，还没有提供一种显示替换内容的机制。
As an important mechanism in security services, access control can protect system resources from invalid usage.
访问控制是安全服务中一种重要的机制，它能够保护系统资源免遭非法使用。
As an important mechanism in security services, access control can protect system resources from invalid usage.
访问控制是安全服务中一种重要的机制，它能够保护系统资源免遭非法使用。
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