Drone safety is not an option, but a baseline.
在计算复杂性中，我们不仅仅是在处理我们能计算的极限，也是在处理我们能证明的极限。
"Every object tells a story if you're willing to listen."
The world is not a pleasant place to be, but it is the only one we have.
把肉扔在饿虎出没的小路上，祸患就无可挽救了。主动招惹麻烦，怎么可能平安无事。