在数学中,你不理解事物。你只是习惯了它们。
In mathematics, you don't understand things. You just get used to them.
Sustainable development is not a slogan, but a social responsibility that enterprises must undertake.
Success is not a destination, but the road that you take.
理论是灰色的,而生活之树常青。
The customer is always right, even when they're wrong.