An object that tells of the loss, destruction, disappearance of objects. Does not speak of itself. Tells of others. Will it include them?

数学中最深刻的问题往往源于最简单的问题。

技术没有捷径，只有不断积累和突破。

你绝对必须知道的唯一东西是图书馆的位置。

音乐是我的治疗方式。