有时候，最难的事情和正确的事情是同一件事。

"What good is the warmth of summer, without the cold of winter to give it sweetness."

未来的无人机将像今天的智能手机一样普及。

The best way to predict the future is to create it.

The more you know, the more you see.

不是追求完美，而是比昨天的自己更好。

Education is the most powerful weapon which you can use to change the world.