translation.en: So my colleague Dr. Robert Govers and I have spent the best part of the last two years, with the help of a large number of very serious and clever people, cramming together all the reliable data in the world we could find about what countries give to the world.
translation.zh: 我的同事Robert Govers博士和我花了 过去两年的大部分时间， 在许多非常认真而聪明的人们的帮助下， 搜集了世界上所有 我们能找到的或国家愿意向世界提供 的数据。