Effluent from the sedimentation tank is dosed with disinfectant to kill any harmful organisms...沉降池中的废水中加入了消毒剂，以消灭所有有害微生物。In the past itinerant merchants sold harmful products.过去,流动的商人出售有毒的产品.Mycosporine - like amino aci...
Such laws could protect the consumer from harmful or dangerous remedies.这样的法规可以保护消费者免受有害或者危险药品的威胁。Polyunsaturated oils are essential for health. Excess is harmful, however.多不饱和油对健康很重要。但是，食用过量就会有害。Whatever is hidden is ha...