Last Updated：2025/12/02
Sentence
現代の椅子の張り地には、厳しい防火基準を満たすために難燃剤が含まれていることが多い。
Quizzes for review
Modern upholstery often contains flame retardants to meet strict fire safety standards.
See correct answer
Modern upholstery often contains flame retardants to meet strict fire safety standards.
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