例句與用法

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1. Vaccination immunizes people against smallpox .
   種牛痘可以免患天花。
2. Suppose she wouldn t let herself be vaccinated again
   她恐怕是不肯重新種牛痘了。
3. Vaccination immunizes people against smallpox
   種牛痘能使人免患天花。
4. Vaccination for smallpox is efficacious
   種牛痘防天花是有效的。
5. The government ordered that all sailors must be vaccinated before they went to sea , and the doctors of the royal navy were so pleased that there was no more smallpox in the ships that they gave jenner a gold medal
   政府命令所有的水手出海之前都要種牛痘，皇家海軍的醫(yī)生對船上沒有了天花太高興了，他們給杰納頒發(fā)了一枚金牌。