地磁活动是地球磁场的自然变化，其波动周期为11年。
Geomagnetic activity, the natural variations in Earth's magnetic field, it fluctuates in 11-year cycles.
那就把人们的注意力从地球气候的自然变化上转移开了，比如冰河时代，对吧？
That takes the focus away from the natural variations in the earth climate, like the Ice Age, right?
代理记录充分表明的是，气候在比几千年更长的时间跨度内发生了重大的自然变化。
What the proxy records make abundantly clear is that there have been significant natural changes in the climate over timescales longer than a few thousand years.
温度只是自然变化吗？
他们研究了太阳的运动，还关注了其他自然变化，如气温、水和植物生长。
They studied the sun's movement and also paid attention to other natural changes such as air temperature, water and plant growth.
关于全球气候的复杂性他们也只能呈现这么多，因此得到关于自然变化性的信息是有限的。
They can do only so much to represent the full complexity of the global climate and hence may give only limited information about natural variability.
我们认为很可能是航途中的自然变化。
We think it quite probably derives from natural changes in the voyage.
偶然的，或是随自然变化而流转。
对照组患者让其口语功能自然变化。
The control group patients' spoken language ability was improved naturally.
随天地自然变化。
现在许多人不再依照地球物理节奏的自然变化生活。
Presently many of us no longer live in accordance with the naturally occurring variation in geophysical rhythms.
但是另外一些科学家却认为这种温度变化趁势是自然变化。
Other experts, however, believe this temperature trend is a natural variation.
必该有一种潜在存在的根本物质，它是所有自然变化的源泉。
There must be an underlying substance that is the source of all natural change.
你不能靠察看天象来了解自然变化的模式，你必须得研究数据。
To understand a pattern in natural variability, you can't look into the sky; you have got to study data.
因此，有效降压和维持血压24小时自然变化的规律是十分重要的。
Therefore, the effective step-down and maintenance of a 24-hour blood pressure changes in the law of nature is very important.
“最终自然变化将再次加强人为改变，可能导致更快速撤退，”荷兰博士说。
"Eventually the natural variations would again reinforce the human-driven change, perhaps leading to even more rapid retreat," Dr. Holland said.
当尼古丁、焦油量、一氧化碳值吸附达到极限时，产品颜色自然变化为暗黄色；
When saturated with tar, nicotine or carbon monoxide, the product will turn dark yellow.
昼夜长短之类的自然变化是如何对野生动物产生如此深刻的生理变化及行为变化呢？
How do natural variations such as the changing day length make such profound alterations to physiology and behaviour?
其中一部分的原因是自然变化的结果，当然主要的原因还是人类对自然界的破坏。
This is because of natural changes, but most responsible for creating deserts are men.
因此，食品化学家对植物性食物在成熟和后熟期间所发生的碳水化合物组成的自然变化特别感兴趣。
The natural changes in carbohydrate composition that occur during maturation and post harvest ripening of plant foods is therefore of particular interest to food chemists.
这对你我来说很可能是无所谓的，但是跟多数自然变化相比较而言，这却是一种快速的增长。
That probably doesn't sound very much to you or to me but it is a rapid increase compared to most natural changes.
这些就是组织的运作过程，它们持续发生在所有有组织的机体的内部结构中，和发生在所有自然变化中。
These are the dynamic processes of organization that continuously take place within the internal structure of all organized beings and in all natural processes.
这对你我来说很可能是无所谓的，但是跟多数自然变化相比较而言，这却是一种快速的增长。
That probably doesn't sound very much to you or to me but it is a rapid increase when compared to most natural changes.
此外，气候年复一年，甚至十年又十年的自然变化与人为的气候变化混合在一起，使我们更难找准其危害行为。
Moreover, year-to-year and even decade-to-decade natural variations in climate are intermixed with human-induced climate change, making it even more difficult to target damaging behaviour.
这些预报考虑到了厄尔尼诺现象、拉-尼娜现象、不断增长的温室气体水平以及太阳活动和全球海洋的自然变化。
The forecasts take into account el Nino and la Nina, ballooning greenhouse gas levels as well as solar effect and natural variations in the world's oceans.
这些预报考虑到了厄尔尼诺现象、拉-尼娜现象、不断增长的温室气体水平以及太阳活动和全球海洋的自然变化。
The forecasts take into account el Nino and la Nina, ballooning greenhouse gas levels as well as solar effect and natural variations in the world's oceans.
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