This paper give the proofs of the Keal Function "a theorem that sum aggregate enumerable set is countable aggregate".

主要讨论了《实变函数论》中定理：“可数个可数集之并是可数集”的多种证明。

youdao

I can then use built-in aggregate functions on the array to get the size and sum of those days overdue and compute an average.

然后我可以使用内置的聚合函数来获取过期天数的大小和总和并计算平均值。

youdao

Because the UPDATE is in the FROM clause it is easy to use the standard SUM to aggregate the end result.

因为UPDATE在from子句中，所以很容易使用标准SUM来聚集最终结果。

youdao

While the income effects sum to zero, the substitution effects aggregate.

WSJ: Arthur B. Laffer: Unemployment Benefits Aren't Stimulus

It had an aggregate score of 229 - not precisely the sum of the three percentages, because of rounding - ranking it 35th out of 47 schools locally in the conventional league tables.

BBC: School 'value' shock is in store

Because of the way the aggregate is calculated it is not necessarily exactly the same as the sum of the three test results.

BBC: NEWS | UK | Education | Guide to the primary school tables