你知道，有些鸟是注定不会关在牢笼里的，它的每一片羽毛都闪耀着自由的光辉。

The theory of economic development is the study of how the economic system generates the forces which incessantly transform it.

"Children deserve books that challenge them, not just entertain."

交易成功的关键是对市场心理有扎实的理解。