数学的真正力量在于它简化复杂事物的能力，使不可理解的事物变得可理解。
The loneliest moment in someone's life is when they are watching their whole world fall apart, and all they can do is stare blankly.
领导力意味着今天做出艰难的决定，为子孙后代带来利益。
The test of a first-rate intelligence is the ability to hold two opposed ideas in the mind at the same time, and still retain the ability to function.