translation.en: That's why investments by Gates Foundation, UNICEF and aid organizations, together with national government in the poorest countries, are so good; because they are actually helping us to reach a sustainable population size of the world.
translation.zh: 那就是为什么盖茨的基金， 儿童基金会和急救机构 和贫穷国家的国家政府 是很好的组织。 因为他们实际上 在帮助我们 达到一个能持续发展的人口数。