;Vaccination for smallpox is efficacious.
牛
是有效的。
疫苗；牛苗；菌苗病毒Vaccination for smallpox is efficacious.
牛是有效的。
Smallpox can be contained by vaccination.
牛疫苗可以控制住。
A new outbreak of smallpox occurred in 1928.
1928 年爆发了新一轮的。
Were you vaccinated against smallpox as a child?
你小时候打过疫苗吗？
The smallpox vaccine has saved many lives.
疫苗挽救了许多人的生命。
Cases of smallpox are becoming rare.
病例日益罕见。
In 1742 he suffered a fatal attack of smallpox.
1742 年，他染上了致命的。
Were you vaccinated against smallpox as a child?
你小时候打过疫苗吗？
A new outbreak of smallpox occurred in 1928.
1928 年爆发了新一轮的。
In 1742 he suffered a fatal attack of smallpox.
1742 年，他染上了致命的。
Cases of smallpox are becoming rare.
病例日益罕见。
Smallpox can be contained by vaccination.
牛疫苗可以控制住。
Vaccination for smallpox is efficacious.
牛是有效的。
Vaccination immunizes people against smallpox.
牛能使人免患。
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