1.The smallpox vaccine has saved many lives.
天
疫苗挽救了许多人的生命。
2.A new outbreak of smallpox occurred in 1928.
1928 年爆发了新一轮的天
。
3.Were you vaccinated against smallpox as a child?
你小时候打过天
疫苗吗?
4.In 1742 he suffered a fatal attack of smallpox.
1742 年,他染上了致命的天
。
5.Smallpox can be contained by vaccination.
种牛痘疫苗可以控制住天
。
6.Cases of smallpox are becoming rare.
天
病
日益罕见。
7.Vaccination immunizes people against smallpox.
种牛痘能使人免患天
。
8.Vaccination for smallpox is efficacious.
种牛痘防天
是有效的。
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