数学中最重要的是理解概念，而不仅仅是记忆公式。
The most important thing in mathematics is to understand the concepts, not just to memorize formulas.
Collaboration across industries is the key to solving complex energy challenges.
Liberal democracy may constitute the "end point of mankind's ideological evolution" and the "final form of human government," and as such constituted the "end of history."
Don't be afraid to give up the good to go for the great.