The cost would be divided among the countries, with the entire project estimated to be between $100-250 billion.

成本将在各国之间分配，整个项目估计在 100-2，500 亿美元之间。

The total fertility rate, which is a projected estimate of the number of children an average woman of childbearing age will have over her lifetime, has been declining for most countries for a while now.

一段时间以来，大多数国家的总生育率一直在下降，这是对平均育龄妇女一生中将生育的孩子数量的预测估计。