可持续发展不仅是一种趋势，更是一种责任。

我本无才又多病，身体衰弱，没想到虚名却传到了皇帝耳中。

语言是灵魂的镜子；它反映了我们最深的思想和情感。

我们不是通过经验学习，而是通过对经验的反思学习。

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.

可持续性不是一种趋势，而是能源的未来。