Free vaccines are more valuable than expensive treatments, yet harder to promote.

We are never the same with others as when we are alone. We are different, even when we are in the dark.

教育是可持续水产养殖发展最有力的工具。

In energy, the only constant is change—embrace it.

过去是知识的巨大源泉，但也是幻觉的巨大源泉。