We've had three big ideas at Amazon that we've stuck with for 18 years, and they're the reason we're successful: Put the customer first. Invent. And be patient.

在能源领域，创新不仅仅是一个选择，而是一种必要。

The best way of learning about anything is by doing.

圆的周长大于任何内接等边多边形的周长，小于任何外切多边形的周长。