There is little doubt, however, that desertification in most areas results primarily from human activities rather than natural processes.
然而，几乎毫无疑问，大多数地区的沙漠化主要是由于人类活动而不是自然过程造成的。
They would have to concentrate on natural processes that continue at a constant rate and that also leave some sort of tangible record in the rocks.
他们必须专注于以恒定速度持续的自然过程，并且在岩石中留下某种有形的记录。
Sediment as you know, is material like sand, gravel, fossil fragments that is transported by natural processes like wind, water flow or the movement of glaciers.
如你所知，沉积物是通过风、水流或冰川运动等自然过程输送的物质，如沙子、砾石、化石碎片等。
In the nineteenth century, scientists made a number of important, but unsuccessful attempts to calculate Earth's age from the record of various natural processes.
19世纪，科学家们做了许多重要的尝试，希望通过各种自然过程的记录来计算地球的年龄，但都未能成功。
Cleaning this smoke has exceeded the protective ability of natural processes.
要清除这些烟尘已超出了自然作用的保护能力。
Strontium and Molybdenum are removed from Marine aquarium water by natural processes.
在正常情况下，锶和钼两种元素会从海水中自然消耗。
Find evidence on your site of its environmental history and ongoing natural processes.
寻找研究点的环境历史和正在进行的自然进程的证据。
The changes of soil quality are the results of both natural processes and human activities.
土壤质量演变是自然过程与人类活动共同作用的结果。
'It is true that thermodynamics is about developing a rigorous understanding of natural processes.
热力学是建立对自然过程的一种缜密的理解。
For example, the amount of water on Earth is limited; this water is cleaned through natural processes.
比如说，地球上的水量是有限的，这些水通过自然作用得到净化。
Now the task is to find evidence on your site of its environmental history and ongoing natural processes.
现在的任务是寻找研究点的环境历史和正在进行的自然进程的证据。
Thus, humans have a need for knowledge which contributes to the control of natural processes-technically useful knowledge.
因此人类需要能够有助于控制自然过程的知识——技术上有用的知识。
They and a host of other previously natural processes have been interrupted, refashioned and, most of all, accelerated (see article).
这两种循环和其他一些此前的自然进程被打断、被改变，而且最重要的是，被加速（看文章）。
It is also well established that human activity is putting more of it into the atmosphere than natural processes can currently remove.
而且目前人类活动产生的二氧化碳已经超出了自然所能将其处理的限度，这一点也已被广泛认同。
New stars had been built of the dust between the stars, some by natural processes, some by Man himself, and those were going, too.
有些新的星从星际的尘埃中产生出来，有的是自然形成，有的是人所造的——它们也在逝去。
Years of studying stem cells in hair roots has allowed them to find ways of tweaking the natural processes to produce new beauty products.
经过几年对头发干细胞的研究，他们发现了通过调整自然生长过程的方法来生产新的美容产品。
However, if we pay attention to the natural processes of life, we then see how we can align with nature and thus our path becomes more clear.
然而，如果我们注意到生命的自然过程，我们就会知道如何符合天性，因此我们的道路会变得更为明朗。
Dioxins are mainly by products of industrial processes but can also result from natural processes, such as volcanic eruptions and forest fires.
二恶英主要是工业过程的副产品，但也可能来自于自然过程，如火山爆发和森林火灾。
Only 32 percent of the people surveyed believe that humans evolved over time by natural processes, compared with 87 percent of scientists.
调查公众中只有32%的人认为人类进化是随时间的自然过程，而有87%的科学家是这样认为的。
In the following article, we will examine some of the natural processes that lead to disasters and ways that humans may be adding to their severity.
下一篇文章会谈谈，一些导致天灾的自然现象和各种可能令灾情加剧的人类活动。
Type priority is the priority of the natural parcels and the natural processes therein during the city construction, which are most significant to city.
类型优先是将对城市具有重要意义的自然地块及其上的自然过程作为城市建设中优先考虑的对象。
So we need to be thinking about how to preserve the natural processes and at the same time provide for the economic needs of the country, " said Smith."
所以我们需要思考如何保护这一自然过程，并同时满足该国的经济需求。
These viruses do not always kill the plant but often disrupt the natural processes so severely that the plant produces abnormal fruit or no fruit at all.
虽然这些病毒不能使葫芦科瓜类作物死亡，但能为害它们自然生长过程，使果实产生畸形甚至绝产。
As a result, many plants and animals are at risk, as well as essential natural processes such as pollination by insects and the regeneration of soils by micro-organisms.
结果，许多动植物面临危险，昆虫传粉和微生物改良土壤等基本自然过程也面临危险。
The group of natural processes, including weathering, dissolution, abrasion, corrosion, and transportation, by which material is worn away from the earth's surface.
指使材料从地表磨损、消耗的一组自然过程，包括风化、溶解、磨蚀、浪蚀、腐蚀和搬运。
The group of natural processes, including weathering, dissolution, abrasion, corrosion, and transportation, by which material is worn away from the earth's surface.
指使材料从地表磨损、消耗的一组自然过程，包括风化、溶解、磨蚀、浪蚀、腐蚀和搬运。
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