释义：要了解过去和现在，以便灵活应变，适应变化。
The only limit to our realization of tomorrow will be our doubts of today.
You can't please everyone, so don't try.
The future of medicine will be shaped by our ability to rewrite the code of life.
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.
不要让任何人掩盖你的光芒。