sapper          
noun [ C ] uk/ˈsæp.ər/ /ˈsæp.ɚ/
 工兵
a solider who does jobs such as building bridges, repairing roads, and laying and clearing landmines (= underground bombs)
  Originally, sappers dug "saps", or trenches, to undermine the walls of fortifications.  最初,工兵们挖"地雷"或战壕来破坏防御工事的墙壁。  
UN-trained local sappers have located and destroyed more than 10,000 antitank mines. 联合国训练的当地工兵已经找到并销毁了10,000多枚反坦克地雷。 
  UK英国皇家工兵 
a soldier in the Corps of Royal Engineers, a unit of the British Army
  He was a 20-year-old sapper in the Royal Engineers.  他当时20岁,是英国皇家工兵部队的一名工兵。 
 - More examples
- The sappers cleared the area and detonated the shell.
- The Kazakh troops are sappers, trained to dispose of explosives.
- Alan served as a sapper in the 17th Construction Engineers.
- Like special forces and rangers, sappers must attend a specialized school where they are taught to perform under the harshest conditions.