vacciniin

例句：

1. 1.The vaccine was a game-changerin the fight against the pandemic.
   疫苗在抗击大流行中起到了革命性的作用。
2. 2. Thescientist developed a new vaccine that could protectagainst the virus.
   这位科学家研发了一种新疫苗，可以预防这种病毒。
3. 3. Vaccinationis essential for preventing the spread of diseases.
   疫苗接种对于预防疾病传播至关重要。