The concept of legal validity is crucial for understanding the nature of law.

The best ideas often come from challenging the status quo.

能源的未来不是要在化石燃料和可再生能源之间做出选择，而是找到确保可持续性和经济增长的正确平衡。

The second half of the Internet is industrial Internet.

对于一个演员来说，最重要的是在表演中诚实和真实。

A rat in a maze is free to go anywhere, as long as it stays inside the maze.