在数学中，你并不理解事物。你只是习惯了它们。
In mathematics, you don't understand things. You just get used to them.
The office of President is one which requires the utmost diligence and attention.
The only merit I have is to have painted directly from nature.
The most profound ideas in mathematics often arise from the simplest observations.
制造业的未来在于平衡自动化与人类的创造力。
The most important challenge facing the world today is the need to create strong, effective, and accountable states in the developing world.