The American farmer is the only man in our economy who has to buy everything he buys at retail, sell everything he sells at wholesale, and pay the freight both ways.
The monument is a fixed point in the changing city.
河流向那些敢于倾听的人低语秘密。
True courage is not the absence of fear, but moving forward despite it.
数学不仅仅是一种工具;它是一种思维方式。