And then it bottoms out and starts to get rich again.

“微生物的降到最低点，然后再次开始活跃起来。”

Some scientists estimate that the mass of microbes living deep underground equals the mass of all the life at Earth's surface.

一些科学家估计生活在地下的微生物的，所有生在地球表面的生物的差不多。

Also, the overall number of marine animals has gone down by about half since 1970.

另外，自1970年以来，海洋生物的总体已经下降了近一半。

People who study science use this word to talk about the number of different kinds of living things on the earth.

研究科学的人用这个词来谈论地球不同种类生物的。

But this still only explains why there's more life, not why there is more different kinds of life.

但这只能解释生物的丰富，而不能解释物种的多样。

And in one teaspoon of soil, there are more microorganisms than there are people on the Earth.

在一茶匙土壤中，微生物的比地球的人口还要多。

So bottom-feeding fish populations may increase, even if plankton-eating fish population decrease.

因此，即使以浮游生物为食的鱼类减少，底栖鱼类也可能会增加。

Insects make up the largest class of animals on earth and represent more than half of all known living organisms.

昆虫是地球最多的一类动物，占所有已知生物的一半以。

Stool sample analysis revealed significant differences in the diversity and volume of microbes between the monks and their neighbours.

粪便样本分析显示，僧侣和他们的邻居在微生物的多样性和在显著差异。

Human activity is the driver of the declines we're seeing, primarily our demand, our increasing demand for food, energy, water.

人类活动导致了当前生物的减少，这主要是因为我们对食物、能源和水资源的需求日益升。

These changes may increase pathogenic organisms or their activity causing a series of oral infectious diseases such as dental caries or periodontal diseases.

这些改变可能会增加致病微生物的或提高其活性，从而导致诸如龋齿、牙周疾病等一系列口腔感染性疾病。

Researchers say these creatures will now reproduce in larger numbers than before because of the extra space created by the rubbish.

研究人员表示，由于垃圾产生的额外空间，这些生物现在的繁殖将比以前更多。

They are food for so many of the inhabitants here, and they're so numerous they really dominate the oceans around here.

它们是这里许多其它生物的食物，它们如此之多，它们主宰了这片海洋。

Sweden-based Innoscentia is developing a sensor that can show if meat is safe to eat by measuring the buildup of microbes inside its container.

总部位于瑞典的Innoscentia公司正在开发一种传感器，该传感器可以通过测肉类容器中微生物的积聚来判断肉类是否可以安全食用。

Meanwhile in Florida's Everglades, Burmese pythons, thought to have been released by pet owners, are the cause of decreasing populations of organisms.

与此同时， 在佛罗里达州的大沼泽地，缅甸蟒蛇被认为是宠物主人放生的，它们是生物减少的原因。

And they saw that there was an immediate decline in the number and diversity of gut microbes among the immigrants, compared to their counterparts still living back home.

他们发现，与生活在故乡时相比，这些移民在进入美国后，其肠道微生物的和多样性立即下降。

A major UN report is set to warn of a global ecological catastrophe calling for immediate action to reverse a dramatic decline across the natural world.

联合国一份重大报告提醒人们出现了全球生态灾难 呼吁人们立即行动起来 扭转全球自然生物骤降的局面。

Wang said that due to overfishing in the past, the number and diversity of marine life have been damaged, and the artificial reefs are playing a restorative role on the ecosystem.

王教授说，由于过去的过度捕捞，海洋生物的和多样性受到了损害，人工鱼礁正在对生态系统发挥恢复作用。

What is amazing is that while the number of human cells in the average person is about 30 trillion, the number of microbial ones is higher-about 39 trillion.

令人惊奇的是， 虽然普通人体内的人体细胞约为 30 万亿个，但微生物细胞的更高——约为 39 万亿个。

Although this is quite difficult when you're looking at fish, because they're so mobile, and then thirdly the calculate the rate at which the decline of the species is happening.

不过这一点在观察鱼类的时候相当困难，因为它们流动性太大了。第三步是计算这种生物减少的比率。