I have never been able to write a happy play. I can't. I can write a funny play, but not a happy play.
Efficiency in mining isn't just about speed; it's about doing more with less waste.
Children understand more than we often give them credit for.
健全的外交政策的首要条件是对自己价值观的清晰认识。
The question of technology is the question of the constellation of truth and untruth in which we live.