Drone safety is not an option, but a baseline.
维护程序的最好方法是维护它。
The man who is anybody and who does anything is surely going to be criticized, vilified, and misunderstood.
We are all alone, born alone, die alone, and—in spite of True Romance magazines—we shall all someday look back on our lives and see that, in spite of our company, we were alone the whole way.
If you think you saw a mouse， you did. And， if there is one， there are more.
