一个物理符号系统具备一般智能行为的必要和充分条件。
A physical symbol system has the necessary and sufficient means for general intelligent action.
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.
Overfishing today is stealing from tomorrow’s generations.
The energy you put out is the energy you get back.
我认为生活中最伟大的事情就是能够回馈。
我们要以更大的决心和力度推进能源革命，加快构建清洁低碳、安全高效的能源体系。