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.
我是一个有使命的女人，不达目的绝不停止。
The beauty of mathematics lies in its simplicity and depth.
阅读是一种同理心的行为。你正在走进别人的鞋子，通过他们的眼睛看世界。