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。
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。
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。
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 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。
Generally, however, such animals pose little threat to the human population.
不过总体而言，这些动物对人群构成的威胁并不大。
The human population took roughly 250,000 years to reach 1 billion (in about 1800).
人类花了25万年人口才达到10亿（大约在1800年左右）。
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。
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。
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。
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。
Secondly, the expanding human population requires more living space, and forests are always the first choice humans decide to sacrifice.
其次，不断扩张的人口规模需要更多的生存空间，而森林往往是人类愿意牺牲的第一个选择。
The real extinction problem, he says, is human population pressure: habitat destruction, pesticide abuse, overharvesting, and species invasion.
他说，真正的灭绝问题是人类的人口压力：居住地的破坏、滥用杀虫剂、过度捕杀、物种入侵等。
The monkeypox virus is transmitted to people from a variety of wild animals and it spreads in human population through human-to-human transmission.
猴痘病毒由各类野生动物传播给人类，病毒通过人与人传播方式在人群中蔓延。
The monkeypox virus is transmitted to people from a variety of wild animals and it spreads in human population through human-to-human transmission.
猴痘病毒由各类野生动物传播给人类，病毒通过人与人传播方式在人群中蔓延。
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