Making something variable is easy. Controlling duration of constancy is the trick.

在追求数学真理的过程中，我们常常发现更多的问题而非答案。

You have to be strong mentally to succeed at the highest level.

"The books that help you most are those which make you think the most."

The energy transition must consider each country's specific conditions.

追求数学真理是一项崇高的努力。