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开窗防癌地面及许多建筑材料都能释放致癌气体——氡及其子体(氡衰变的物质),开窗可使室内空气中的这类致癌物降到最小密度。
Window-opening, anti-cancer floors and many building materials can release carcinogenic gases—carbohydrates and their daughters (the decaying substances of pupa). Opening windows can reduce such carcinogens in indoor air to the minimum density.