| 例句 |
It is difficult to determine the exact cause of the illness.很难断定致病的确切原因。Whether diet is an important factor in this illness is still uncertain.饮食是否是这种病的重要致病因素仍然无法确定。People used to believe that dirt spontaneously generated disease.人们过去相信污物会自发致病。We are still woefully ignorant of the causes of this disease.令人悲哀的是，我们对这种疾病的致病原因仍然一无所知。Smoking is a causative factor in several major diseases.吸烟是好几种严重疾病的致病因素。The gene is only part of the causation of illness.基因只是一部分致病原因。Both nicotine and carbon monoxide inhaled with cigarette smoking have been incriminated as causative factors.抽烟时吸入的尼古丁和一氧化碳都已经被标定为致病因素。Tests revealed an unhealthy level of lead in the water.试验结果表明水中的铅含量达到了致病水平。Age is one of the risk factors for this disease.年老是这种疾病的致病因素之一。The gene is only part of the causation of illness.基因只是致病的部分原因。 |