释文：不了解事情的真相就高谈阔论，便是不明智；如果知道了而不谈，就 是不忠诚。

The end of history will be a very sad time. The struggle for recognition, the willingness to risk one's life for a purely abstract goal, the worldwide ideological struggle that called forth daring, courage, imagination, and idealism, will be replaced by economic calculation, the endless solving of technical problems, environmental concerns, and the satisfaction of sophisticated consumer demands.

The difference between good and great is the extra effort.

要解决复杂的问题，我们必须首先理解产生这些问题的系统。

Innovation isn’t just about technology; it’s about changing the way we think and operate.

物理定律必须以独立于坐标系选择的方式表述。