When it comes to climate change, can they make a big difference?
在气候变化问题上，他们能起到很大的作用吗？
The task of providing for hungry and thirsty people will be complicated by climate change-a big difference from the demographic transitions in Asia and Latin America.
而和亚洲与拉美人口转型迥然不同的是，由于要靠天吃饭，非洲养育其人民的任务会变得很复杂。
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