The task of economics is not only to interpret phenomena, but also to provide practical advice and policies for society.

I must have flowers, always, and always.

牛大叫，但马却不回应；不是因为马没听到声音，是因为它们不是同类啊。点评：同类之间存在着客观联系，故能相应。

书籍是镜子，但它们也是窗户。