过去总是存在，只是有时比其他时候更明显。

译文：先从忧患方面考虑事情的人，就会享受到乐事，一时的操劳辛苦是永远安逸的开始。赏析：我们做事要有忧患意识，要有先苦后甜的意识，如果只图安逸快乐，就是祸患的开始。

基础设施互联互通对区域经济一体化至关重要。

I don’t like to do easy things. I like to challenge myself.

人工智能中逻辑系统的研究不仅仅是形式化，更是理解推理的本质。

You are never too old to set another goal or to dream a new dream.

The interplay between quantum mechanics and general relativity is one of the most profound puzzles in modern physics, and solving it may require a complete rethinking of our understanding of the universe.

Design without functionality is art, but design with functionality changes lives.

The horror of the Twentieth Century was the size of each new event, and the paucity of its reverberation.