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A professional chemist in a modest lab coat and safety glasses, meticulously observing a clear glass beaker on a pristine lab bench. Inside the beaker, a copper wire visibly transitions from shiny to a darkened, oxidized state. Beside it, a small, partially browned apple slice and a piece of rusted iron illustrate common oxidation examples. The laboratory is well-lit with modern equipment in the background, conveying a clean and organized environment. The subject maintains a natural pose with perfect anatomy, well-formed hands, and correct proportions. The image is a professional photograph, high quality, safe for work, appropriate content, fully clothed, and family-friendly.

산화환원 실험 실패율 0% 도전 당신만 몰랐던 성공 비결

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