prepster

例句：

1. 1.He is a prepster who prepares for emergencies.
   他是一个为紧急情况做准备的预备役人员。
2. 2. The prepsters are responsible for the security of the event.
   这些预备役人员负责该事件的安全保障。
3. 3.During the war, many people became prepsters to survive in harsh conditions.
   在战争期间，许多人成为了预备役人员以在恶劣条件下生存。