The inflationary universe model provides a possible explanation for the origin of the universe.
The duty of a true patriot is to protect his country from its government.
我坚信统治阶级的哲学，尤其是我统治的时候。
在商业中，你必须愿意适应，但绝不能以牺牲核心价值观为代价。
Economics is the study of how societies use scarce resources to produce valuable goods and services and distribute them among different individuals. If we think about the definitions, we find two key ideas that run through all of economics:
Concrete is the marble of our time, a democratic material.