The hepatitis C virus was a hidden enemy, but every hidden enemy can be found with the right tools and determination.

知识若不付诸实践，便毫无价值。

Modularity is essential for building large, maintainable systems, as it allows us to break down complex problems into smaller, more manageable parts.

信任是每一段牢固商业关系的基础。

我们在Facebook上试图做的事情，就是帮助人们更有效地连接和沟通。