guard gating

例句：

1. 1. The soldiers were ordered to guard the border.
   士兵们被命令守卫边境。
2. 2. The guards patrolled the area around the palace.
   守卫在宫殿周围的区域巡逻。
3. 3. The guards were vigilant in their duties.
   守卫们对他们的职责非常警觉。