Word · Frequency #20447
sentinel
哨兵；卫兵；守望者
核心释义
A sentry, watch, or guard; a person employed to keep watch for some anticipated event.
- 1.
哨兵,守卫
A sentry, watch, or guard.
- 2.
受雇守望预期事件的人
a person employed to keep watch for some anticipated event
- 3.
计算机程序中用于特殊处理或标记数据集结束的独特值
A unique value recognised by a computer program for processing in a special way, or marking the end of a set of data.
- 4.
哨兵蟹
A sentinel crab.
- 5.
健康风险的标志(例如疾病,不良反应)
A sign of a health risk (e.g. a disease, an adverse effect).
哨兵值；标记值；健康风险征兆；警示信号；大眼蟹；哨兵,守卫；受雇守望预期事件的人
用法In use
The sentinel stood guard at the entrance all night.
用法提示：sentinel作名词，表示站岗的哨兵。
Ancient cities often had sentinels posted on the walls to watch for approaching enemies.
用法提示：sentinel复数形式sentinels，指多个哨兵。
During the camping trip, we took turns being sentinel to keep the fire going.
用法提示：sentinel作可数名词，表示轮流值守的人。
a sentinel at sth
用 at 引出哨兵值守的具体地点，如 at the gate、at the door。
A sentinel stood at the gate all night.
一名哨兵整夜守在门口。
stand sentinel (over sth)
stand sentinel 是固定说法，表示站岗守望；over 后接被守卫的对象。
相关词与表达Connections
搭配Collocations
- stand sentinel
- 站岗；放哨；守卫
- Soldiers stood sentinel at the gate.士兵们在大门站岗。
- sentinel value
- 哨兵值；标记值
- The program uses -1 as a sentinel value to mark the end of input.该程序用 -1 作为哨兵值，标记输入结束。
- sentinel node
- 前哨淋巴结
- The surgeon checked the sentinel node for signs of cancer.外科医生检查前哨淋巴结是否有癌症迹象。
- sentinel event
- 警讯事件；重大安全事件
- The hospital reported a sentinel event to the health authority.医院向卫生部门报告了一起警讯事件。
- sentinel species
学习提示Learner notes
记忆技巧Memory Tip
记忆联想：sentinel 拆成 sent + in + el，哨兵被派去(sent)守在里面(in)，警觉瞭望。
语境与语域Context & Register
语域：mixed 常见场景：军事或文学语境、计算机编程与数据处理、公共卫生与医学 该词作名词时语域随语境变化：军事或文学中多用于书面语，偏正式；计算机与数据处理领域属于专业术语；公共卫生中可指健康风险标志。日常对话中若指“哨兵/守卫”，guard 是比较常见的替代词。
发音与拼写Pronunciation & Spelling
None of these is a full rhyme with sentinel /ˈsɛntənəl/. Sentry, sentence, and sentiment genuinely match only its opening /sɛnt/. Sensitive is a useful spelling lookalike but is pronounced /ˈsɛnsətɪv/, not /ˈsɛntə-/. Kennel and channel share the written ending -nel but have different vowels: /ˈkɛnəl/ and /ˈtʃænəl/.
一起学习词形Learn the forms together
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from ECDICT, WIKTIONARY.