translation.en: I cannot tell you whether the aid we have spent in the past has made a difference, but can we come back here in 30 years and say, "What we have done, it really prompted a change for the better."
translation.zh: 我不能告诉你 过去的援助花费是否起了作用 但是 30年后我们可以回到这里 然后说 ”我们所做的一切 真的促进了事情往好的方向改变“