In international trade, a country should specialize in the production of goods for which it has a comparative advantage, and trade with other nations to maximize overall economic welfare.
时光飞逝，带着我们一同远去。我正在说话的这一刻已离我远去。
最重要的发现是那些迫使我们修正先前观念的发现。
I want to stand as close to the edge as I can without going over. Out on the edge you see all kinds of things you can't see from the center.
The most reliable way to forecast the future is to understand the present.