翻译:真正的朋友,顺境时不添虚假繁华,逆境时不改变初心,富贵时不忘记旧交,这样的情谊才珍贵。
The writer must be a person who is willing to be misunderstood.
The beauty of mathematics is that it allows us to see patterns and structures in the world that are not immediately obvious.