What can be done to ensure enough food for the world's population to live on?

为了确保全世界的人口都有足够的食物维持生活，我们能做些什么？

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Low prey population levels then provide inadequate food for the predators, causing the predator population to decrease.

较少的猎物数量为捕食者提供了不足的食物，导致捕食者数量减少。

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Fears are now being voiced that the planned construction of an oil pipeline across the lake's bottom might revive pollution and cause the fish population to decline again.

现在有人担心，计划修建的穿越湖底的输油管道可能会重新造成污染，导致鱼类数量再次下降。

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"We are appealing for a ceasefire, which would allow the civilian population to escape the fighting and enable aid workers to resume deliveries of humanitarian assistance,"

VOA: standard.2009.08.21

How do we enable our population to acquire those skills and continue to develop?

我们如何使国家获得这些能力,并持续发展呢？

麻省理工公开课 - 媒体、教育、市场课程节选

So more than doubling the risk can certainly site to the population Now these kind of results show how important it is to do studies that don't group everybody in the population together.

由图可见,发病率差异量超过一倍,这些研究结果表明,在研究过程中分组的重要性

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

With a few exceptions, blue states seem to be losing jobs and population to red states.

CNN: Commentary: GOP wants a census we can count on

Cellular use is likely to increase from 29% of the population to 45% by 2010.

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Asadi says that as the marsh revived, many people returned, swelling the population to around 36, 000.

NPR: Iraq's Marshlands Face A Second Death By Drought