我不是为了纪录而打球。我打网球是因为我爱它。
We must invest in our people as much as we invest in our technology.
我认为你永远不能停止学习。总有新的东西等待发现。
What I’ve achieved in tennis is great, but who I am as a person is more important.
Technological innovation is the fundamental way to solve the problems of the coal industry.