仓库里空虚了日子就会难，子孙愚笨了怎么知晓礼义呢？

The two greatest enemies of the equity fund investor are expenses and emotions.

The connection between Galois groups and automorphic forms is one of the most profound mysteries in mathematics.

石油开采的创新不是可选项，而是满足世界能源需求的必要条件。