And they're looking at Africa because that yellow line is showing you that the number of young Africans is going to continue to get bigger decade after decade after decade out to 2050.
而考虑非洲的原因是 那条黄线正在告诉我们 非洲的年轻人数量 会持续的增加， 一个十年接着一个十年一直到2050年。