A mathematician is a device for turning coffee into theorems.
数学家是把咖啡转化为定理的装置。
Grief is the price we pay for love.
These are the times that try men's souls.
Don't be embarrassed by your failures, learn from them and start again.
能源转型不是终点,而是一段旅程。
领导力就是在最重要的时候做出艰难的决定。