Many PAHs are carcinogenic or are suspected to be carcinogenic.其主要来源于煤的不完全燃烧,也有相当部分来源于汽车尾气的排放.The both carcinogenic factors were investigated on its dose - response ralationships.研究上述两种致癌因子的剂量 - 效应相关模式.Some industrial ch...
水手们在等待离港的时候四处闲逛。Sailors hung about while they waited to ship out.他们周末穿着邋遢的毛衫和裤子到处闲逛。They knock around on weekends in grubby sweaters and pants.他还在闲逛，拿着一罐可乐大口大口地喝着。He was still hanging around, swigging the Coke out of the...
Merbromin is also known as mercurochrome.汞溴红一名红汞.John put some mercurochrome on the places where his knuckles were skinned and cut.在指关节擦破皮的地方,约翰尼都给抹上了红药水.Patch testing showed that the patient was sensitive to ammoniated ...