| 例句 |
A cold, unlike strep throat, is caused by a virus.与链球菌性喉炎不同，感冒是由病毒引起的。Mononucleosis is a disease caused by the Epstein-Barr virus.单核细胞增多是一种由爱–巴病毒引起的疾病。Scientists speculate that the illness is caused by a virus.科学家推断这种疾病是由一种病毒引起的。Sometimes it's hard to tell whether illnesses result from bacteria or viruses.有时候很难分辨疾病到底是细菌引起的还是病毒引起的。A virus was found to be the causative agent of smallpox.人们发现天花是由病毒引起的。Malaria is caused by a virus carried by mosquitos.疟疾是由蚊子携带的病毒引起的。Is the illness caused by bacteria or a virus?这种病是细菌引起的还是病毒引起的？They think it may be caused by a virus.人们认为这可能是由一种病毒引起的。The doctor speculated that a virus caused the disease.医生推测是某种病毒引起了这种疾病。Most throat infections are caused by viruses.大多数喉部感染都是由病毒引起的。At first the doctor said I was suffering from a virus, but now he's changed his mind.最初，医生说我的病是由病毒引起的，可现在他的看法变了。The Institute says that an unidentified virus is to blame for the syndrome.研究所称是一种不明病毒引起了这种综合征。It's not yet clear whether the disease is caused by a virus.这种疾病是否由病毒引起还不确定。The doctors have attributed the cause of the illness to an unknown virus.医生们认为这种疾病是由一种未知的病毒引起的。 |