Group One the Americas, Group Two Europe, and Group Three Africa , Asia and the Middle East.

第一组是美洲小组, 第二组是欧洲小组, 第三组是亚非中东小组.

A 2-1 defeat by Sweden left them bottom of Group One.

1比2负于瑞典之后，他们处在了第一小组的最后一名。 。

The unknown points are joined to reference star group one by one and stars are extracted by judging whether the moment invariants of group are still equal after inserting new point.

向参考恒星组逐一加入未知星点，通过判断增加星点后不变矩是否仍相等来提取恒星；