经济增长发生在人们以更有价值的方式重新安排资源时。

The only limit to our realization of tomorrow is our doubts of today.

The first fruit of this imagination - and the first lesson of the social science that embodies it - is the idea that the individual can understand his own experience and gauge his own fate only by locating himself within his period, that he can know his own chances in life only by becoming aware of those of all individuals in his circumstances.

光线不断变化，每分钟都在改变事物的氛围和美感。

Learning is any change in a system that produces a more or less permanent change in its capacity for adapting to its environment.