The challenge for modern states is to maintain their legitimacy while also being effective in providing services and maintaining order.
Every day is a new opportunity to change your life.
中心地的等级越高,其服务的区域越大,此类中心地的数量越少。
The boldness of his mind was matched by the candor of his speech.
下一次绿色革命必须既高效又对环境负责。