监狱看守

例句：

1. 1.The prison guard stood watch over the inmates.
   监狱看守站岗监视囚犯。
2. 2. She is a guardian to her younger sister.
   她是一位姐姐的监护人。
3. 3. The policeman was a guardian of the community's safety.
   那位警察是社区安全的守护者。