It could be that we all start having a lot of children in the future, and the growth rates are going to be higher, but from now on, these are the best projections we have, and this will make global growth decline and the gap between the rate of return go up.
但是我们未来可能 都会有很多小孩， 增长率变得更高， 但是今后 这是我们最后好的预测， 这会导致全球增长 下滑和回报率的差距 会加大。