本文首次提出局部格群这一新概念。

In this paper, we at first introduce a new concept.

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后来等到这群贵客走进舞场的时候，却一共只有五个人——彬格莱先生，他的两个姐妹，姐夫，还有另外一个青年。

And when the party entered the assembly room, it consisted of only five altogether; Mr. Bingley, his two sisters, the husband of the oldest, and another young man.

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这个扩展被称为格罗坦狄克群。

This extension is known as the Grothendieck group.

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