Health Preservation:Harmful Substances.
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✵To protect one's own health, one need to stay away from environmental harmful substances, the harmful substances in the kitchen, and other common harmful substances in living environment are introduced.
- The Harmful Substances in the kitchen.
- The Harmful Substances in the kitchen, this carcinogen was in the kitchen and was hidden for ten years! It's a cutting board that hasn't been thrown in ten years.