Demographic and epidemiological transitions now combine with nutritional and behavioural transitions to create ominous new trends.
人口和流行病学方面的转变现与营养和行为方面的转变结合起来，产生不祥的新趋势。
2
The task of providing for hungry and thirsty people will be complicated by climate change-a big difference from the demographictransitions 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。
3
Which leads to the second reason for pessimism: Africa’s families are under greater strain than Asia’s or Latin America’s were when their demographictransitions first began.