Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
Be a pro. Back up your back up. Have at least one physical backup and one backup in the cloud. Have more than one of each. How much would you pay to retrieve all your data， photos， notes， if you lost them？ Backups are cheap compared to regrets.
"What is said cannot be unsaid, and what is heard cannot be unheard."
学习数学的唯一方法就是做数学。
造纸业有着丰富的历史，但我们必须始终向前看。
“最好的报复是巨大的成功。”
无用的法律削弱了必要的法律。
