Mathematics is the foundation upon which we build our understanding of the world, and it is through this understanding that we can solve the most complex problems.

Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.

The war on coal is a war on the American worker.

一个人必须经过一番刻苦奋斗，才会有所成就。

创新是互联网未来的关键。