However, a subgroup of patients treated within 3 hours of symptom onset showed possible benefit.

然而亚组分析中当在症状出现3个小时内使用镁时，患者可能会受益。

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In Chapter 3, we investigate how the number of conjugacy classes outside a normal subgroup of a finite group influences its structure.

第三章主要研究有限群的正规子群外的共轭类的个数对群结构的影响。

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These patients had acne vulgaris ranging from mild to severe and were a subgroup of patients from phase 3, randomized, double-blind, vehicle-controlled, multicenter clinical trials.

这些患者有轻到重度痤疮，是基质对照随机双盲多中心3期临床试验的一个亚组。

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