单词：Salk vaccine
Salk vaccine的用法和样例：
例句
- Salk vaccine is a"killed" vaccine.沙克疫苗是一种不会传染的疫苗。
- The coalition urged AIDS scientists not to begin trials of other new vaccines until more definitive conclusions could be reached from further analysis of the Merck vaccine.该联盟敦促艾滋病科学家没有开始审判的其他新的疫苗之前，更确切的结论，可以达到从进一步分析默克疫苗。
- ipv(=improved) ...
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