Randomized evaluations can help us understand what works and what doesn't in development.
The biggest pressure is the pressure I put on myself.
The night is a great symphony, but the stars are its notes.
外交需要克服短期利益的诱惑，着眼于长远利益和全球发展。
You have to expect things of yourself before you can do them.
Quality is not a cost; it is an investment.
