你唯一的限制是你给自己设定的限制。
除非你努力,否则梦想不会实现。
The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.
现在如果天下的人都相信鬼神能赏贤罚暴,那么天下怎么还会混乱! 
The application scenarios of drones far exceed our imagination.