什么是传染病？
非典是一种传染性疾病。
Measles is a contagious disease.
麻疹是一种传染性疾病。
Measles is a contagious disease.
麻疹是一种传染病。
Scarlet fever is a contagious disease.
猩红热是有传染性的疾病。
Scarlet fever is a contagious disease.
猩红热是一种传染病。
Mumps is a contagious disease by a virus.
腮腺炎是一种由病毒引起的传染病。
Bird flu is a contagious disease caused by TYPE a flu virus.
禽流感是由A型流感病毒引起的传染性疾病。
Measles is a highly contagious, serious disease caused by a virus.
麻疹是病毒引起的传染性极强的严重疾病。
This is a highly deadly and contagious disease.
这是一个非常致命的和传染性疾病。
Out because it is a highly contagious disease.
列，因为它是一种传染性很强的疾病。
Mental retardation is not a disease itself. it cannot be cured and it's not contagious.
智力迟钝本身并不是一种疾病。它不可治愈，而且不传染。
Smallpox is a highly contagious disease unique to humans.
天花是人类独有的高传染率的疾病。
Measles is a highly contagious disease.
麻疹是有高度传染性的疾病。
He got a certain contagious disease at the end of year.
年底时他得了一种传染病。
He got a certain contagious disease at the end of year.
年底时他得了一种传染病。
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