隨機(jī)評估可以幫助我們了解發(fā)展中哪些措施有效，哪些無效。
Randomized evaluations can help us understand what works and what doesn't in development.
創(chuàng)新不僅僅是技術(shù)問題，它關(guān)乎人、文化以及營造一個(gè)讓想法蓬勃發(fā)展的環(huán)境。
一本書是世界的一個(gè)版本。如果你不喜歡它，忽略它；或者提供你自己的版本作為回應(yīng)。
The comfort of the rich depends upon an abundant supply of the poor.
Our industry must adapt to the changing energy landscape while continuing to meet the world's growing energy demands.