We're expecting that problem to get worse as world population grows to nine billion or 10 billion by midcentury, and we can expect to have greater pressure on our food resources.
我们预计到21 世纪中期 当人口达到90 亿 至 100 亿时 饥荒会变得更加严重， 到那时， 我们也会给食物来源施加更大的压力。 根据我们现在的状况，