As we'll see in future tutorials, ASP.NET 2.0's ObjectDataSource makes it easy to declaratively access data from a class.
我们将在后面的教程中看到，ASP.NET 2.0的ObjectDataSource使从一个类中访问数据更加容易。
If s designates the sum of ages of employees 30 years and older across all slices and if s I is the sum within the i-th slice, it is easy to see that s is the sum of si.
如果s指定所有片上的年龄在30岁以上员工的年龄总和并且如果s i是第i片内的总和，那么很简单，S就是Si的总和。
If s designates the sum of ages of employees 30 years and older across all slices and if s I is the sum within the i-th slice, it is easy to see that s is the sum of si.
如果s指定所有片上的年龄在30岁以上员工的年龄总和并且如果s i是第i片内的总和，那么很简单，S就是Si的总和。
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