Last Updated：2025/11/21
Sentence
規制検査で、廃水中のクロム酸イオンの濃度が安全基準を超えていることが示された。
Quizzes for review
Regulatory tests showed that chromates exceeded safe limits in the wastewater discharge.
See correct answer
Regulatory tests showed that chromates exceeded safe limits in the wastewater discharge.
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