ソウル龍山の150か所に謎の落書き…「歯ぎしり」の文字
Mysterious graffiti in 150 locations in Yongsan, Seoul... The word ``bruxism''
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``bruxism'' (teeth grinding), ``bruxism'' (American medical term for bruxism)... There are approximately 150 locations like this, including public places and private land, throughout Seoul and Yongsan-gu.
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