Democracy is not so much a form of government as a set of principles.
民主与其说是一种政府形式，不如说是一套原则。
In the context of computational learning, the concept of 'probably approximately correct' (PAC) learning provides a framework for understanding the efficiency and feasibility of learning algorithms.
I'm trying my hardest, but I can't have everything. I can't have the looks, the rapping ability, the scoring, and the free throws.
最好的投资往往是那些在当时看起来疯狂的项目。
The only limit to our realization of tomorrow will be our doubts of today.
The best and most beautiful things in the world cannot be seen or even touched - they must be felt with the heart.
The best ideas often come from the most unexpected places.