No president who performs his duties faithfully and conscientiously can have any leisure.

The key to success is to keep trying, even when things don't work out the first time.

The most important thing in mathematics is to ask the right questions.

设定新目标或做新梦想永远不会太老。

"The key to AI is understanding how to build systems that can learn from data."

能源转型不仅仅是更换燃料；它关乎整个系统和思维方式的转变。