The pursuit of mathematical knowledge is a journey that never ends, filled with endless curiosity and wonder.
书籍是通往其他现实的窗户。
可持续性必须有利可图，否则就根本不可持续。
可持续性不再是选择，而是我们对后代的责任。
The most important thing is to be honest with yourself and your audience.
In the end, we are all just trying to survive.