数学不是一项观赏性运动。

Never let anyone else define your worth. You are the only one who can decide your value.

战略不是详细的计划或指令程序；它是一个统一的主题，为个人或组织的行动和决策提供一致性和方向。

Sustainability must be the cornerstone of modern quarry operations, not an afterthought.

They throw their shadows before them who carry their lantern on their back.

世界是一个黑暗的地方，但其中也有光明。你只需要去寻找。