名词
中文翻译：牛痘
同义词：
['vaccinia例句：1. The vaccine is effective in preventing the disease.（这种疫苗能有效预防这种疾病。）']
例句：
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1. The vaccine is effective in preventing the disease.
这种疫苗能有效预防这种疾病。
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2.Vaccines are used to protect against diseases.
疫苗用于预防疾病。
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3. The vaccination process involves injecting a small amount of the virus into the body.
疫苗接种过程是将少量病毒注射到体内。