In some schools the children practise Kerb Drill with their teachers.在有些学校里，孩子们跟着老师做安全穿马路操练。Drill sergeants have eight weeks to turn fresh recruits into soldiers.操练军士要在八周内把新兵训练成士兵。Drill a hole through the back of the cupboard and pass the wires through.在壁橱后面钻个洞把电线穿过去。