名词短语
中文翻译：最小的
同义词：
['smallest sigma-additive group', 'smallest sigma-additive set']
例句：
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1.This is the smallest sigma-additive family of all.
这是所有中最小的σ-加性族。
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2. The researchers found that this was the smallest sigma-additive family they had ever seen.
研究人员发现，这是他们见过的最小的σ-加性族。
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3. They were able to identify the smallest sigma-additive family in the region.
他们能够识别出该地区最小的σ-加性族。