The most iconic addition to the castle was the remarkable keep, a masterpiece of medieval military architecture.
城堡最具标志性的建筑是其宏伟的主楼,它是中世纪军事建筑的杰作。
英语百科
Military engineering
Military engineering is loosely defined as the art and practice of designing and building military works and maintaining lines of military transport and communications. Military engineers are also responsible for logistics behind military tactics. Modern military engineering differs from civil engineering. In the 20th and 21st centuries, military engineering also includes other engineering disciplines such as mechanical and electrical engineering techniques.