You can’t go back and change the beginning, but you can start where you are and change the ending.

The future belongs to those who prepare for it today.

Quality is never an accident; it is always the result of intelligent effort.

Drones are not toys, but tools to transform industries.

一本书是作者和读者穿越时间的亲密对话。

解释：本治则国家巩固，本乱则国家危亡。