制药行业的可持续性不是一种选择，而是一种责任。
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.
解释：兵器既不齐全又不锋利，实质上和没有兵器一样！
We thought that we had the answers, it was the questions we had wrong.
