There are two group experiments.

实验共进行了两组。

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Then the effects of the two group cases were observed and compared.

观察并比较两组治疗效果。

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At last, two group experiments are given, the results indicate that this testing system has high precision and popular prospect.

最后给出了两组人体重心测试实验，实验结果表明该测试系统具有较高的精度，有良好的推广前景。

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In two thousand two the group had suggested such screening tests every one to two years for women forty and older.

VOA: special.2009.11.18

The third group that was given the candies and put in a positive playful mood outperformed the other two groups significantly-- they thought about more options and they actually came up with better solutions with that problem.

第三组得到糖果,并获得积极愉快的心情,明显比另外两组有更好表现-,他们考虑更多选择,得出更好的问题解决办法。

哈佛公开课 - 幸福课课程节选

Now, remember, the formation of the ionic bonds was from group one and group two, and over here with group six and seven.

现在请记住，离子键的形成,从第一族和第二族元素，与六七主族的元素相互构成的。

麻省理工公开课 - 固态化学导论课程节选

The other two Group A teams, China and Kuwait, will face each other in Saturday's only fixture.

CNN: Hosts Qatar shocked in Asian Cup opener

The Gunners have also qualified for the knockout stages of the Champions League, with two group games to spare.

BBC: CHOOSE A SPORT

The 37-year-old is regarded as one of England's best officials and took charge of two group games at Euro 2008.

BBC: Webb crumbled on penalty - Jenas