When you do something best in life, you don’t really want to give that up – and for me it’s tennis.

The whole world is a story, and I’m trying to tell it.

The tragedy of great power politics is that it leads to conflict and war.

我们选择记住的和选择忘记的同样能说明我们自己。

可持续发展不仅仅是一种趋势，而是我们对后代的责任。