名词
中文翻译：牛痘病
同义词：
['smallpox', 'variola']
例句：
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1.The smallpox vaccine is a highly effective treatment for this disease.
天花疫苗是治疗这种疾病的高效治疗方法。
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2. Smallpox was once a common killer in many parts of the world.
天花曾经是世界上许多地方的常见杀手。
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3. Vaccination against smallpox has been a major public health initiative since the 19th century.
自19世纪以来，对天花的疫苗接种一直是主要的公共卫生倡议。