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a sapper
sapper 是可数名词，指从事布雷、排雷或挖坑道的军事工兵；单数形式前用 a/an。
A sapper was sent to clear the minefield.
一名工兵被派去清除雷区。
工兵；地雷工兵
sappers — plural of sapper
先理解核心含义，再看它在真实句子里的用法。
工兵；地雷工兵
a military engineer who lays, detects, or disarms mines
A sapper was sent to clear the minefield.
一名工兵被派去清除雷区。
战斗工兵；从事攻击、摧毁、规避或建造防御工事、桥梁和道路的工程师或士兵；在作战区域活动的军事工程师。
A combat engineer; an engineer or a soldier engaged in attacking, destroying, and circumventing or building fortifications, bridges, and roads; a military engineer active in a combat zone.
从事需要一定专业水平的挖掘工作的人。
a person generally engaged in digging requiring a level of professionalism
The sapper defused the mine before the patrol arrived.
那名工兵在巡逻队到达之前拆除了地雷。
The sappers dug a trench under the enemy wall.
工兵们在敌墙下方挖了一条壕沟。
A sapper must know how to detect hidden mines.
工兵必须懂得如何探测隐藏的地雷。
sapper 是可数名词，指从事布雷、排雷或挖坑道的军事工兵；单数形式前用 a/an。
A sapper was sent to clear the minefield.
一名工兵被派去清除雷区。
复数形式 sappers 与 the 连用，可特指某支部队中已知的工兵群体。
The sappers dug trenches under the enemy position.
工兵们在敌方阵地下方挖坑道。
who 引导的定语从句用以说明 sapper 的具体任务，如布雷、排雷或挖坑道。
A sapper who detects mines must wear protective gear.
探测地雷的工兵必须穿戴防护装备。
Not this
There were two sapper in the tunnel.
Use this
There were two sappers in the tunnel.
sapper 是可数名词，表示一名工兵；数量为二或以上时需加复数词尾 -s，因此要用 sappers。
Not this
They sapper the enemy fortifications before the attack.
Use this
They sap the enemy fortifications before the attack.
sapper 是名词，不能当动词用；表示‘挖坑道/破坏工事’的动词是 sap，因此要把 sapper 改为 sap。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
工兵营
The sapper battalion was deployed to clear the minefield.
工兵营被部署去清雷区。
作战工兵
He served as a combat sapper in the special forces.
他曾在特种部队担任作战工兵。
敌军工兵
The guards were on alert for enemy sappers attempting to undermine the wall.
卫兵们保持警惕，以防敌军工兵试图挖塌城墙。
工兵训练
New recruits undergo rigorous sapper training before deployment.
新兵在部署前要接受严格的工兵训练。
工兵部队
A sapper unit was called in to defuse the unexploded bombs.
一支工兵部队被召来处理未爆炸弹。
Use sappers naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
记忆联想：sap（挖土）加 -per（人）= 挖坑道、排地雷的工兵。
语域：neutral 常见场景：军事教材、战争回忆录、国防新闻报道 该词通常用于军事语境，指负责挖坑道、布雷或排雷的工兵；在日常口语中较少出现，比较常见于正式或专业表达。
这些词都以 /-æpə/ 结尾，与 sapper /ˈsæpə/ 押韵（美式英语中结尾为 /-æpər/）。注意不要被拼写相近的 super /ˈsuːpə/、supper /ˈsʌpə/、sap /sæp/ 误导，它们的元音或拼读不同。
Dictionary facts from ECDICT, WIKTIONARY.