——杜先生晚年在香港，先生为中国抗战.赈灾慈善做出巨大贡献，晚年依旧气度过人，毁掉所有欠条。
"The greatest glory in living lies not in never falling, but in rising every time we fall."
大家都是被命运所控制的人，一星半点都由不得自己。
"The 21st century is oppressed by a crushing sense of finitude and exhaustion."
Topology is the study of the properties of a figure that are unchanged by any deformation.