sentinel

sentinel
[ˈsɛntɪn(ə)l]
noun
  1. a soldier or guard whose job is to stand and keep watch
    哨兵
    ■(figurative)something that appears to be standing guard or keeping watch
    (喻)警戒物；看守物
    ■(Medicine)a thing that acts as an indicator of the presence of disease
    (医)哨点
    [as modifier]the first national HIV sentinel surveillance programme in the developing world.
    发展中国家首次艾滋病毒哨点监测计划。
(sentinelled, sentinelling; 美 sentineled, sentineling )
  1. [with obj.]station a soldier or guard by (a place) to keep watch
    派兵守卫（某地）
    a wide course had been roped off and sentinelled with police.
    用绳子围了一块宽阔场地，并由警察看守着。
    trees sentinelled the trenches.
    树木守卫着战壕。
常用词组
stand sentinel
  1. (of a soldier) keep watch
    （士兵）站岗
    soldiers stood sentinel with their muskets.
    士兵们持枪站 岗。
    a tall round tower standing sentinel over the river.
    一座高高耸立在河上方的圆塔。
语源
  1. late 16th cent.: from French sentinelle, from Italian sentinella, of unknown origin
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