网球是一项残酷的运动。没有平局。如果你输了，你就出局了。

You can’t control everything in life, but you can control your attitude.

Life lies not in living but in liking.

The art of life is to live in the present moment, and to make that moment as perfect as we can.

I've learned that you can't control what other people think of you, but you can control what you think of yourself.

数学是概念之间关系的科学，与内容无关。

农业成功的真正标准不仅是产量，还有生产它的生态系统的健康。