为确保可比性，每一组将得到一套同样的问题。

Each group will have the same set of questions, in order to ensure comparability.

《牛津词典》

观察每一组，试着增加更多的组。

Look at each group and try to add more groups.

youdao

每一组有6只老鼠。

Each group had 6 rats.

youdao

A cohort study means you take the same group of people and follow them every five years for that period of time.

定群研究意味着你只有一组研究对象,然后在研究期间每五年进行一次记录数据

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Each group needed a justification for saying how interesting the task was, but they each had a justification.

每一组都需要一个理由来说明,这个任务有多有趣，但他们各自有自己的理由。

耶鲁公开课 - 心理学导论课程节选

So in each set, the first and second plague are forewarned that's what the FW is on the side--whereas the third plague is not.

在每一组中，第一个和第二个瘟疫都是被预先警告,而第三个却没有。

耶鲁公开课 - 旧约导论课程节选