n.疫苗,痘苗;
例句:
Anti-malarial vaccines are now undergoing trials...
抗疟疾的疫苗正在试验阶段。
In 1983 the first rotavirus vaccine was ready for testing.
到了1983年,第一个轮状病毒疫苗已准备就绪,可进行试验.
a measles vaccine
麻疹疫苗