The psychologist must avoid all forms of mental chemistry.
The farmer is the only man in our economy who buys everything at retail, sells everything at wholesale, and pays the freight both ways.
It is common sense to take a method and try it. If it fails, admit it frankly and try another. But above all, try something.
文化唯物主义基于一个简单的前提,即人类社会生活是对地球生存实际问题的回应。
今天的投资研究可以预防明天的危机。
Diplomacy is not an end in itself if it does not advance the interests of the nation.