有一个人从天堂来到人间旅游，他所使用的是有效三十天的减价票，他试图要把他的回程票卖掉。
The pursuit of a unified theory of physics is not just an academic exercise; it is a journey towards understanding the very fabric of reality.
The future of energy lies in balancing profitability with responsibility.
The act of reading is an act of resistance in a landscape of distraction.
Flowers always make people better, happier, and more helpful; they are sunshine, food and medicine for the soul.