To overcome this restriction and to maximize the flexibility of a relational database system, DB2 V9.5 introduces the concept of global variables.
为克服这种约束并最大化实现关系数据库系统的灵活性，DB2V9.5引入了全局变量的概念。
You can extend a global type definition by using the xs: extension element or restrict it by using the xs: restriction element.
您可以通过使用xs：extension元素扩展全局类型定义，也可以通过使用xs：restriction元素限制它。
Another challenge is the global outreach restriction due to geographical factors and limitation due to the current information technology infrastructure.
另一个挑战是全球推广的限制，是由于地理因素和目前的信息技术基础设施的限制。
Student 3: Do you consider the restriction of the emission of carbon dioxide a core method, and what's your opinion on radical solution of global warming?
学生三：您认为限制二氧化碳排放是主要的办法么？全球气候变暖问题的治本之策是什么？
Student 3: Do you consider the restriction of the emission of carbon dioxide a core method, and what's your opinion on radical solution of global warming?
学生三：您认为限制二氧化碳排放是主要的办法么？全球气候变暖问题的治本之策是什么？
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