
sentinels
词源
源自法语 'sentinelle',最早于16世纪进入英语,原意为'守卫',可能来自意大利语 'sentinella',与拉丁语 'sentire'(感知)相关。
noun
❶ 指站岗或巡逻的哨兵,负责警戒和保护特定区域或人员的安全。常用于军事或重要场所的守卫。
“The sentinels stood guard at the castle gates all night.”
(哨兵整夜守卫在城堡大门处。)
“Ancient civilizations often placed sentinels along their borders.”
(古代文明常在边境沿线布置哨兵。)
❶ 比喻指监测或预警系统,用于发现潜在危险或变化的事物。常用于科技或自然领域。
“These satellites serve as sentinels for climate change monitoring.”
(这些卫星是监测气候变化的哨兵。)
“The canary in the coal mine was a biological sentinel for toxic gases.”
(煤矿中的金丝雀是有毒气体的生物监测器。)
常见短语
stand sentinel — 保持警戒状态,通常指长时间保持高度警觉的守卫行为。
“The ancient oak trees stand sentinel over the battlefield.”
(古老的橡树如同哨兵般守卫着战场。)
silent sentinels — 指不引人注目但持续发挥监视或保护作用的物体或系统。
“The security cameras were silent sentinels recording every movement.”
(监控摄像头是记录每个动作的无声哨兵。)