Last Updated：2025/11/25
Sentence
地域の規制では、地下水の汚染を防ぐために浄化槽の年次検査を義務付けています。
Quizzes for review
Local regulations require annual inspections of septic tanks to prevent groundwater contamination.
See correct answer
Local regulations require annual inspections of septic tanks to prevent groundwater contamination.
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