translation.en: To start thinking about saying, "Let's do not the things where we can do very little at a very high cost, not the things that we don't know how to do, but let's do the great things where we can do an enormous amount of good, at very low cost, right now."
translation.zh: 要告诉人们：让我们不要做那些 代价高昂而果效不彰的事情， 也不要做那些我们不懂得怎样做的事情； 让我们现在就做那些我们能做， 作价便宜，而又带来庞大效益的事情，