累次指多次，出自汉朝蔡邕的《胡公碑》，“相与累次德行，撰举功勋，刊之于碑，用慰哀思”。
adv. repeatedly ; again and again
... successionalspecies继承种 successive累次 递次 successiveapproximatevalues逐次近似值 ...
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我们还用那个来建立累次积分。
这里还没有变成累次积分。
利用一致极限概念，建立了累次极限的几类换序条件，得到若干结果。
By using the concept of uniform limit, several conditions for exchanging order of repeated limit were established and several results were also acquired.
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