进化是一个漫长的过程。
Evolution is a slow process.
I don't have to say anything; my songs say it all.
The function of entrepreneurs is to reform or revolutionize the pattern of production by exploiting an invention or, more generally, an untried technological possibility for producing a new commodity or producing an old one in a new way.
如果你停下来听一个音乐家或街头艺人表演超过一分钟，你就欠他们一美元。