求翻译：　　5、如沾有污渍，可用干净抹布蘸水擦拭，为避免留下印迹，最好从污渍外围抹起。丝绒家具不可蘸水，应使用干洗剂。是什么意思？

　　5, such as stained with dirt, clean cloth dipped in water to clean, to avoid leaving marks, preferably from the dirt from the perimeter. Velvet furniture is not dipped in water, should be used dry cleaning agent.