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群 「ぐん」「むれ」「むら」
group; bunch; crowd; throng; swarm; band; herd; school (of fish)
出群 しゅつぐん
excellence; pre-eminence
群系 ぐんけい
formation; classification of plant communities
問題群 もんだいぐん
group of problems; set of issues
情報群 じょうほうぐん
information group