The human population swelled, at least temporarily, as migrants moved south.
随着移民们南移，人口便增加了，至少是暂时增加了。
Our forefathers had no idea that human population would increase faster than the supplies of raw materials.
我们的祖先没有想到人口的增长速度会超过原材料的供应速度。
Their use in medicine has only increased as the human population and subsequent demand has grown significantly.
它们在医学上的用途只随着人口和后续需求的显著增长而增加。
I want to tell you about the past, present and future of the human population. So let's start with a few problems.
我想告诉你们有关人口数量的过去、现在和未来。那么让我们从一些问题入手。
Within that same time frame, we evolved into an urban species, in which 60% of the human population now lives vertically in cities.
在同一时期，人类逐渐开始适应城市生活，目前有60%的人口分布在城市的纵深之中。
Applying the most conservative estimates to current demographic trends, the human population will increase by about three billion people by then.
按照对目前人口趋势的最保守估计，到那时人口将增加约30亿人。
The idea is that around the year 1800 CE the human population became large enough, around a billion people, that its activities started altering the environment.
这种想法出现于公元1800年左右，当时人口变得足够多，大约有10亿人，人类的活动开始能够改变环境。
It's not only the study of human population, but the populations of non-human species, including viruses.
这不仅是对人类种群的研究，也是对非人类种群（包括病毒）的研究。
I want to tell you about the past, present and future of the human population, so let's start with a few problems.
我想告诉你们关于人类的过去、现在和未来的事情，所以让我们从一些问题入手。
The human population contains a great variety of genetic variation, but drugs are tested on just a few thousand people.
人类群体中有各种各样的基因变异，但是药物只在几千人身上进行测试。
And, off-world colonization might help absorb an exploding human population.
再者，地外殖民化有可能帮助容纳爆炸的人口。
The parasite infects approximately one-third of the world's human population.
这种寄生虫感染了全世界将近三分之一的人口。
In "Secrets of the Savanna" they issued a strong call for human population control in Africa.
在《稀树大草原的秘密》一书中，他们发出了非洲应当控制人口的强烈呼唤。
Information on the behaviour of Marburg virus once it enters a human population is sparse.
关于马尔堡病毒一旦进入人群的行为的信息贫乏。
valuable is he to society, to his friends, to his family, to the human population in general?
通常，有价值是指一个人对家人，对朋友，对社会，对人类有价值吗？
They are also the places where most forest is most directly threatened by an exploding human population.
这些国家的爆炸性人口增长又恰恰直接威胁到森林。
It is home to a human population of only 23,000 and has hundreds of endemic species of plants and animals.
这里仅有23000人口并且有数百种具有地方特色的植物和动物。
To them, the earth has a surplus population of polluters, and those polluters are the human population.
对他们来说，地球上有一群“过剩”的污染源，而这些污染源正是人类。
Such large concentrations of animals close to dense human population often cause considerable pollution problems.
如此大量集中的动物靠近人口密集的地区，往往带来大量的污染问题。
But the films also clearly depict a human population that is, again and again, boxing above its weight class.
但影片也清晰地刻画出了一个族群一而再再而三地与高重量级别的对手进行搏击。
There is no evidence to date that person-to-person transmission alone can sustain monkeypox in the human population.
迄今为止，没有证据表明仅仅通过人际间传播就可使猴痘在人群中持续存在下去。
At six billion plus today, the earth's human population will reach more than nine billion by 2050, according to estimates.
据估计，到2050年，地球总人口将在如今六十亿的基础上增加到九十亿。
The only time the human population declined was in the years following 1347, the start of the of the plague 'Black Death' in Europe.
人类人口减少的唯一时间段是1347年之后的数年，即黑死病在欧洲蔓延期间。
The only time the human population declined was in the years following 1347, the start of the of the plague 'Black Death' in Europe.
人类人口减少的唯一时间段是1347年之后的数年，即黑死病在欧洲蔓延期间。
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