Because charcoal is a poor conductor of heat, particularly through the dead calloused skin on the bottom of your feet and especially if you scoot across the bed of coals as quickly as fire walkers are wont to do.

• 因为木炭是热的不良导体，尤其人脚下还长了结茧的死皮，而你又像习惯走火堆的人那样飞奔过一堆木炭。