The sun did not know how beautiful its light was until it was reflected off this building.

希望是一个卷起袖子的动词。

永远不要停止提问，因为那是发现的开始。

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.

我们生产的每一块塑料都应该有明确的再利用或回收路径。