sentry box岗亭;值班岗亭;哨岗
Sentry Ward岗哨守卫;哨岗保卫;岗哨保卫;哨岗守卫
Sentry Tower警戒塔
The Sentry哨兵;机器人
Sentry Totem岗哨图腾
Sentry Group国善卫集团;地区;美国买家
Flash Sentry疾电阿坤
frontier sentry边防哨;边防哨所
N-COUNT（可数名词） A sentry is a soldier who guards a camp or a building. 哨兵; 警卫
The sentry would not let her enter.
警卫不会让她进来。