a soldier 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。

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。