Mentally he was still patrolling the site, noting the course of storm-drains and the interplay of vaulting and walls.

• 精神上，他仍旧在那个地方一路闲逛，或者正儿八经走一遭，巡视一遍，看看暴雨下水道的线路以及拱形圆顶和墙壁的交互感应。