经济发展理论研究的是经济系统如何产生不断改变它的力量。
The theory of economic development is the study of how the economic system generates the forces which incessantly transform it.
道理明白则文辞畅达，气势充沛则言辞得当。
The earth is a dot. The moon is a dot. The sun is a dot. The stars are dots.
In mathematics, the journey is as important as the destination.
让它简单。让它难忘。让它吸引人。让它读起来有趣。
El escritor debe ser fiel a su voz interior, aunque eso signifique nadar contra la corriente.
The past is never really past—it shapes who we are.
A composer's biography is written in his scores, not in his letters or diaries.