Students are divided into four groups, and each group member has different "job".

学生们分为四组，每组成员各司其职，共同完成学习任务。

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Cells were divided into four groups and one group was incubated with 5-ala and irradiated 4-5h later.

细胞被分为四组，其中一组和5 - ALA一起进行培养，4 - 5小时后进行照射。

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The rats were divided into four groups: normal control group, kidney-yang deficiency model group, positive drug group, and YOL group.

实验分为正常对照组、肾阳虚模型组、阳性药物治疗组和颐和春治疗组。

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The 12 teams are divided into four groups of three, with the top two teams in each group qualifying for the second phase, where there are two groups of four.

BBC: English teams eye Twenty20 glory

The 20 remaining teams are to be divided into a final stage of five groups of four, with the resultant group winners going onto the World Cup in South Africa and the top three in each group qualifying for the 2010 Nations Cup finals in Angola.

BBC: SA to play in World Cup qualifiers

The teams will be divided into two groups of four teams each, with the top two teams from each group qualifying for the semi-finals.

BBC: Champions League format announced