translation.en: One of my students, who has now become an instructor, when he lost his vision, after a few months he was sitting in his three story house and he realized that he could hear everything going on throughout the house: conversations, people in the kitchen, people in the bathroom, several floors away, several walls away.
translation.zh: 我有过一名学生，现在已经成为教员了， 在他失明后的几个月， 他正坐在三层楼高的家里， 发觉自己能听到屋子里 正在进行的一切： 厨房里、浴室里人们的谈话 几层之外，几墙之隔的声音。