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首先，这是一种传染性极强的病毒。
First, this is a very contagious virus.
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麻疹是病毒引起的传染性极强的严重疾病。
Measles is a highly contagious, serious disease caused by a virus.
youdao
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麻疹是病毒引起的传染性极强的严重疾病。
Measles is a highly contagious, serious disease caused by a virus.
youdao