过去是一条河流，我们都被它的水流带走。
The past is a river, and we are all carried by its currents.
In the beginning there was nothing, which exploded.
Every mathematical problem is a window into a new world of understanding.
数据驱动的决策将彻底改变我们管理牲畜健康和生产力的方式。
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.