当帮助人们摆脱贫困陷阱时,微小的改变可以产生巨大的影响。
一个在真正饥饿时被喂食、在疲倦时被允许睡觉的婴儿会是一个满足的婴儿。
For every expert there is an equal and opposite expert, but for every fact there is not necessarily an equal and opposite fact.