Finally it concludes that factors influencing group work are various, among which mix-ability grouping method and required information exchange task meet more approval.

得出的结论是：影响分组活动的因素是多方面的，其中以赞成能力交叉分组方法和信息轮流交换型任务的居多。

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Many members form the benefit community in view of similar benefit and goal to raise the ability of negotiating, which demonstrates the grouping inclination in the trade negotiation.

许多成员基于相似的利益和目标结成利益共同体以提高谈判能力，表现出贸易谈判中的集团化倾向。

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Perceptual grouping refers to the human visual ability to extract significant image relations from lower-level primitive image features without any knowledge of the image content.

感知归类是指人们在不拥有任何图像内容知识的前提下，从底层原始图像特征中提取有效的图像联系的一种视觉能力。

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We have the students grouped according to ability, that is we have head-engine in grouping.

我们将学生分组,根据他们的能力，因此在一个小组中有不同能力的人。

麻省理工公开课 - 媒体、教育、市场课程节选

Dr Hallam's report - Ability Grouping in Schools - reviewed literature on ability grouping from the first studies in 1919 to 2001 and looks at research evidence from Europe, the USA and the Far East.

BBC: Streamed classes 'demotivate'

It said research also suggests grouping by ability had a bad effect on children in the lowest groups.

BBC: Summer-born hit by school streaming