没有任何一位总统能够忠实地、认真地履行他的职责，还能有闲暇时间。

Never stop learning because life never stops teaching.

To me, fearless is not the absence of fear. It's not being completely unafraid. To me, fearless is having fears. Fearless is having doubts. Lots of them. To me, fearless is living in spite of those things that scare you to death.

I'm not afraid to speak my mind because I know that's who I am.

云计算的最大意义在于降低了创新的门槛。