silent sentinels 沉默的守卫者
sentinels of liberty 自由的哨兵
tireless sentinels 不倦的监视者
1. The sentinels stood motionless at the castle gates.
哨兵们一动不动地守在城堡大门前
2. The mountains act as natural sentinels protecting the valley.
这些山脉宛如天然的卫士，守护着这片山谷
3. They were sentinels of the ancient tradition.
他们是古老传统的守护者
A: Do you see the soldiers at the gate?
A：你看到大门那里的士兵了吗。
B: Yes, they are the sentinels guarding the entrance.
B：是的，他们是守卫入口的哨兵。
1) 哨兵
2) 监视者
3) 守护者
1. 哨兵，守卫
e.g.
The sentinels remained at their posts all night.
哨兵们整晚都坚守在岗位上。
noun
1. A person or thing that stands watch or acts as a guard.
Synonym: guard, sentry, lookout