A legal system is a system of rules which are valid according to the system's own criteria of validity.

The future of food security lies beneath the waves, and we have a responsibility to unlock it wisely.

苏联人是一个永远在等待的人——等待配给，等待命令，等待终结。

不要为成功而努力，要为做一个有价值的人而努力。

有的人忙着死，有的则人忙着活。