The night is a great cathedral, but the stars are its windows.

My favorite things in life don't cost any money. It's really clear that the most precious resource we all have is time.

构建软件系统最困难的部分是准确决定要构建什么。

Randomized evaluations can help us understand what works and what doesn't in development.

农业的未来在于对农民和环境都有利的可持续实践。