真正的友情在困难时才会被考验。
无人机的未来是开放和共享的。
书籍是飞机，是火车，是道路。它们是目的地，也是旅程。它们是家。
The joy of discovery is what keeps scientists going.
Our greatest natural resource is the minds of our children.
Poetry is the language of the soul, and the soul speaks in the language of the heart.
The success of an enterprise is not accidental, but inevitable.