This grouping operation serves to localize repetitions and therefore enhance the degree of compression.

该分组操作本地化重复，从而提高压缩程度。

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When sorting and grouping by author, the author of the top-level comment will be used as the basis of the operation.

在根据Author进行分类和分组时，顶级注释的作者将会用作操作执行的基础。

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Attention should be given to the convenient grouping of valves requiring operation during the automatic starting up of the plant.

应注意把成套发电设备自动启动时需要用的那些阀门集中在一起以方便操作。

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Both countries are members of the Shanghai Co-operation Organisation, a grouping of Central Asian nations that both China and Russia have been nurturing (with limited success) as a counterbalance to America's influence in the region.

ECONOMIST: The dragon comes calling

Its biggest element, the Christian Democratic National Peasants' Party to which both the president, Emil Constantinescu, and the prime minister, Victor Ciorbea, belong has been at war with liberal members of the grouping over which companies should close, a row that bodes ill for future co-operation.

ECONOMIST: Romania