我是一个非常冷静的人。这有助于我在网球和生活中的表现。
幸福的秘诀是自由，而自由的秘诀是勇气。
Hard work and perseverance will always pay off.
The most important challenge facing the world today is the need to create strong, effective, and accountable states in the developing world.
Every technological breakthrough comes from the exploration and persistence of the unknown.
