Boredom is their greatest enemy. Just imagine every day having to face frozen instruments and a huge sheaf of forms over a long period--could you be anything but bored?
無聊，顯然是當值者最大的敵人，想想看，在這麼長的時間內，每天都得面對冰冷的機器和一長串的報表，能不無聊嗎？