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？
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。
To start with, it forced the population to abandon the nomad's life and became sedentary, to develop methods of storage and, often, systems of irrigation.
首先，它会迫使人们放弃游牧生活定居下来，因而使人们开发存储的方法，往往也会开发灌溉系统。
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。
With no natural predators and expanses of green suburban neighborhoods that allow no hunting, wildlife officials estimate the New Jersey deer population to have grown to exceed 175,000.
由于没有天敌，又有大片绿色的郊区禁止捕猎，野生动物官员估计，新泽西鹿的数量已经超过17.5万只。
Hunan province has 61 million people, a comparable population to France's 57 million.
湖南省有人口6千1百万，与法国的5千7百万人口大致相当。
Hunan province has 61 million people, a comparable population to France s 57 million.
湖南省有人口6千1百万，与法国的5千7百万人口大致相当。
It is also trying hard to encourage a traditionally passive population to become more innovative.
该国也努力鼓励那些消极人口更加具有创造力。
Though her species survives, the genetically distinct Columbia Basin population to which she belonged does not.
虽然该物种仍然存在，哥伦比亚盆地的独特基因种群已经不复存在。
Henan province with its 85 million people has a comparable population to Mexico with its population of 92 million.
河南省有人口8千5百万，与墨西哥的9千2百万人口大致相当。
In the next two decades people aged 65 and over will rise from 17% of the voting-age population to 26% (see chart 1).
在接下来的20年，年龄达到和超过65岁的人将从占选举人口的17%提高到26%。
In 1970 Japan's urbanisation ratio (the proportion of urban population to total population) was still just 53 per cent.
1970年，日本的城市化率(城市人口占总人口的比率)仅为53%。
And the reasons for all the 'singles' could be many: from an elderly population to a large number of college students.
而且单身人士比例甚高的原因可能有很多：从老年人到为数众多的大学生都有可能单身。
Reducing peak population to roughly 8 billion, for example, could save 29 percent of expected greenhouse gas emissions.
例如，将峰值人口减至80亿，将能减少29%的预期排放量。
Last night, Gabonese state television announced the closure of all borders and called for the population to remain calm.
昨天晚上，加蓬国家电视台宣布关闭所有边界并且号召全体民众保持平静。
This was done to build awareness and get the participating population to make the reporting task part of their weekly routine.
这个过程是为了培养志愿者的自觉意识，让他们每周都报告数据。
Overall "we estimated the decline in this pig-nosed turtle population to be more than 50% since 1981," said Professor Eisemberg.
总体而言“我们估计从1981年以来猪鼻龟数量的下降超过了50%，”艾森·博格教授说道。
The Census Bureau expects the population to grow by 40% over the next four decades, equivalent to the entire population of Japan.
美国人口统计局预计在未来四十年内，美国的人口会增长40%，增量相当于整个日本的人口数量。
Since 2000, the U.S. market has relied increasingly on less than one-third of the population to consume more than half of all new cars.
自从2000年，美国市场越来越依赖不到三分之一的人口来消费超过半数的新车。
Since 2000, the U. s. market has relied increasingly on less than one-third of the population to consume more than half of all new cars.
自从2000年，美国市场越来越依赖不到三分之一的人口来消费超过半数的新车。
We are, I say, considering transplanting the beaver population to an innovative beaver Habitat, to be installed upstream of the Retention Area.
我会告诉他们说，我们正在考虑将所有海狸迁到位于保留区上游的一个新型海狸栖息地。
Social mobilization activities are now under-way to alert the local population to the human health risks associated with this disease in animals.
社会动员活动正在开展之中，以提醒当地人民警惕与此动物疾病相关的人类健康危险。
Japan's collectivist ideals necessarily arose to allow the nation's large population to live comfortably together in a comparatively small archipelago.
日本集体的理想必然是要让整个庞大的国民人口共同生活在较小但颇为舒适的群岛上。
With TV and radio calling on the population to seek medical advice for any flu-like symptoms, queues grew at clinics and hospitals across the city.
电视和电台不断告诫人们，有流感样症状要及时就医。随后，整个城市的医院和诊所都排起了长龙。
The eruption sent the planet immediately into a 'volcanic winter', which is thought to have reduced the human population to less than 10, 000 individuals.
此次喷发瞬间让地球进入了“火山冬季”，使人口数降低到不足10,000。
The fight to wrest control of Buner from the militants was fierce, shattering towns and forcing more than half the population to flee the mountainous region.
围绕控制布纳的战斗空前激烈，很多城镇被毁，从而迫使当地一半以上的人口逃往山区。
Influenza pandemics, whether moderate or severe, are remarkable events because of the almost universal susceptibility of the world's population to infection.
无论是温和的，还是严重的，流感大流行都是值得注意的大事，因为世界上的所有人口几乎都普遍易于感染流感。
Influenza pandemics, whether moderate or severe, are remarkable events because of the almost universal susceptibility of the world's population to infection.
无论是温和的，还是严重的，流感大流行都是值得注意的大事，因为世界上的所有人口几乎都普遍易于感染流感。
应用推荐