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A focused professional, fully clothed in modest, comfortable attire, intensely studying at a clean, modern desk in a quiet, well-lit home office. Textbooks and reference materials are neatly stacked around a laptop displaying complex diagrams. The subject's expression shows deep concentration and resilience, reflecting perseverance through challenging environmental studies. The room is tidy and conducive to learning. Perfect anatomy, correct proportions, natural pose, well-formed hands, proper finger count. Professional photography, high quality, vibrant colors, soft lighting. Safe for work, appropriate content, fully clothed, professional, family-friendly.
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水質環境技士試験 一発合格の秘訣！知らないと損する効率勉強法

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