预期是经济动态中的驱动力。

The study of law involves both the analysis of legal rules and the understanding of their social context.

"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."

"The beauty of cinema lies in its ability to make us feel less alone."

小于给定数的素数个数是该数的一个函数。

跨国合作是保护我们共同海洋遗产的关键。