Nature is the best teacher.

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.

国与国之间是平等的，人与人之间也是平等的，在人格与尊严上是没有贵贱之分的，上天对所有人都是一视同仁的，人生而平等是上天赋予每个人的不可被侵犯的权利。

Only two things in this world so that our souls are deeply shocked First, our brilliant stars overhead, First, our hearts lofty moral laws.

数学让我们看到支配周围世界的隐藏结构。

"Every person has a story worth telling, and every story has a lesson worth learning."

The beauty of mathematics lies in its ability to reveal the hidden structures of reality.

你涉及丑闻时，你发觉你的真朋友是谁。