第一组的人是音乐家，而第二组的人没有受过音乐训练。

The people in the first group were musicians, while those in the second group had no musical training.

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第二组从飞机上往火上浇水。

The second group drops water on the fire from an airplane.

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当对两组学生的学习内容进行测试时，第二组“明显优于”第一组。

When the two groups were tested on what they'd learned, the second group "significantly outperformed" the first.

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And that group did much better on the learning task than the control group, because they were put into a positive mood.

第二组,在学习任务上比对照组表现更好，因为他们被置于积极情绪。

哈佛公开课 - 幸福课课程节选

One group of children was a control group; the second group was taught to think back to experience that make them laugh or smile.

一群小孩组成对照组;,有人教第二组小孩回想,让他们大笑或微笑的经历。

哈佛公开课 - 幸福课课程节选

All of these from the group one and two through the group five and six elements, but what about elements, what about molecules like hydrogen, or nitrogen, or maybe oxygen?

所有的这些都是来自于第一主族和第二组主族,到第五主族和第六组主族的悬殊，那么元素呢，比如氢气，氮气或氧气那样的分子呢？

麻省理工公开课 - 固态化学导论课程节选