木头有记忆。它记得森林。它记得树。

For systems, the analogue of a face-lift is to add to the control graph an edge that creates a cycle, not just an additional node.

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.

灵感可以来自最意想不到的地方。