名词
中文翻译：天花病毒
同义词：
['smallpox virus', 'cowpox virus例句：1. The pox viruses are highly contagious and can cause severe illness.（天花病毒极易传染，能引起严重的疾病。）']
例句：
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1. The pox viruses are highly contagious and can cause severe illness.
天花病毒极易传染，能引起严重的疾病。
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2.Researchers have been working to develop a vaccine against the pox viruses.
研究人员一直在努力开发一种针对天花病毒的疫苗。
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3. The pox viruses are classified as a group of viruses that infect humans and animals.
天花病毒属于一类感染人类和动物的病毒。