The international system is inherently competitive, and states are constantly trying to outmaneuver each other.
电影就像一场梦；它不是用来理解的，而是用来体验的。
可持续性必须成为我们开采每一块石料的核心，否则我们什么也不该开采。
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.