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work as a lifeguard
She works as a lifeguard at the city pool.
她在城市游泳池当救生员。
救生员
先理解核心含义，再看它在真实句子里的用法。
救生员
a person employed at a beach or pool to protect swimmers from accidents
She works as a lifeguard at the city pool.
她在城市游泳池当救生员。
救生员:通常为游泳高手,受雇在水域救助遇险或溺水者的救援人员。
A lifesaver: a rescuer, usually an expert swimmer, employed to save swimmers in trouble or near drowning at a body of water.
受雇于海滩或泳池、保护游泳者免于事故的救护人员
an attendant employed at a beach or pool to protect swimmers from accidents
安装在火车前导轮前方的坚固金属支架,用于挡开小物体以防脱轨。
A sturdy metal bracket fixed in front of each of the leading wheels of a train to deflect small objects away from the wheels to prevent derailment.
The lifeguard watches the pool every afternoon.
救生员每天下午照看泳池。
Lifeguards must act quickly when a swimmer is in danger.
游泳者遇到危险时，救生员必须迅速采取行动。
The lifeguard saved a child from drowning yesterday.
那名救生员昨天救了一个溺水的小孩。
She works as a lifeguard at the city pool.
她在城市游泳池当救生员。
口语中常用，表示紧急时请救生员帮忙。
If you see someone drowning, call a lifeguard immediately.
如果你看到有人溺水，立刻叫救生员来。
on duty 表示“当班、值班”，常用来描述救生员在岗。
There is always a lifeguard on duty during opening hours.
开放时间总是有当班的救生员。
He is training to be a lifeguard this summer.
他今年夏天正在培训当救生员。
Not this
She works as lifeguard at the city pool.
Use this
She works as a lifeguard at the city pool.
"lifeguard" 是可数名词单数，表示职业/身份时前面必须加冠词 "a"。中文说“当救生员”不需要冠词，但英语中单数可数名词不能单独使用，所以要写 "a lifeguard"。
Not this
There are two lifeguard on duty.
Use this
There are two lifeguards on duty.
"lifeguard" 的复数形式是 "lifeguards"。句中有 "two"，谓语用 "are"，名词必须用复数，不能省略词尾 "-s"。
Not this
The life saver at the beach told us to get out of the water.
Use this
The lifeguard at the beach told us to get out of the water.
在泳池或海滩负责救生工作的职业人员叫 "lifeguard"（救生员）；"life saver" 通常指“救命恩人”或救生用具，不是职业名称。这里说的是海滩救生员，所以要用 "lifeguard"。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
海滩救生员
The beach lifeguard spotted the swimmer in trouble.
海滩救生员发现了遇到麻烦的游泳者。
救生站
She reported the incident at the lifeguard station.
她在救生站报告了这一事件。
值班救生员
There was always a lifeguard on duty during opening hours.
开放时间总有一名值班救生员。
叫救生员
If you see someone struggling, call the lifeguard immediately.
如果看到有人挣扎，立刻叫救生员。
当救生员
He worked as a lifeguard at the community pool last summer.
去年夏天他在社区游泳池当救生员。
救生员培训
She completed her lifeguard training before the summer season.
她在夏季来临前完成了救生员培训。
Use lifeguard naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
life（生命）+ guard（守护），海边守护生命的人，就是救生员。
语域：neutral 常见场景：beach、swimming pool、water park lifeguard 是通用的标准词汇，通常用于海滩、游泳池等场所的日常语境，正式与非正式场合都比较常见；作为名词时指负责泳区安全、救助溺水者的工作人员。
发音说明：guard、bodyguard、coastguard、vanguard 都以重读的 /ɡɑrd/ 结尾，和 lifeguard 的后半部分押韵；life 只对应前半部分 /laɪf/，不押韵。注意 guardian /ˈɡɑrdiən/ 虽含 guard 拼写，但发音不同，不押韵。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.