Home kitchens are a common sourceofcontamination, as pathogens from uncooked eggs, meat and vegetables find their way onto countertops, utensils and cleaning tools.
家庭的厨房是传染的普遍来源，像没有煮熟蛋病原体、肉类和蔬菜的病原体常在背面，还有炊具和洗涤工具。
2
Sewage and waste disposal is properly plumbed from the facility and does not provide a potential sourceofcontamination to contact surfaces, products, components, water supplies, etc.
污水与废弃物通过工厂管道正确排放，不能成为接触面，产品，原料与供应水的潜在污染源。
3
On the one hand, living bacteria or parts of the biofilm compound keep on detaching again and again and thus present a microbiological sourceofcontamination for other parts of the system.