Make sure that there is adequate ventilation in the room before using the paint.在使用油漆前确保室内通风充足。DNA is the genetic material inside every cell that carries the blueprints for everything from hair color to the risk of cancer.脱氧核糖核酸是存在于每个细胞内的基因物质，它承载从头发颜色到致癌风险等各种遗传型板。This hole was a scant. 23 inches in diameter.这个洞眼的直径只有0.23英寸。
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