Science is about understanding the world, and engineering is about changing it.

精金美玉般的品性，一定是经历过了，烈火一样的磨砺才修成的；惊天动地的大事业，必须要有履薄冰临深渊般的胆识和魄力，才能成就。

Gunpowder made me understand the transience and eternity of life. 火药让我理解了生命的短暂与永恒。