答：荒漠化是肥沃的土地变成沙漠的过程。
A: Desertification is the process by which fertile land becomes desert.
地中海仅花了两千年就变成沙漠。
It took just two thousand years to transform the Mediterranean Sea into a desert.
理想中的黄金国正在重新蜕变成沙漠。
由于西非人口激增，萨赫勒地区将可能变成沙漠。
The Sahel would be turned into a desert by the soaring population of west Africa.
为什么会有越来越的土地变成沙漠呢？
广大的地区均已变成沙漠。
土地有时变成沙漠，就不再适合于耕种。
Land sometimes becomes desert and can no longer support plants.
如果没有植物，土地会更容易变成沙漠。
大片的土地已变成沙漠。
这座山上有许多植物，所以它不容易变成沙漠。
There are many plants on the hill, so it can't become desert easily.
绿地变成沙漠。
当农田变成沙漠，人们被迫迁移到其他地方耕种生活。
When cropland turns to desert, people move to other places for better land and better jobs.
许多地区将变成沙漠，许多动物将失去家园，甚至灭绝。
Many areas would become deserts and many animals would lose their homes and maybe die out.
虽然地球上一些地方很少下雨，然而它们并没有变成沙漠。
Some places on the Earth don't get much rain. But they still don't become deserts.
沙尘暴主要从邻近的河北省形成，该地区15%的土地已经变成沙漠。
The sand originates largely from neighboring Hebei province where 15% of the land has turned into desert.
土地有时会变成沙漠并且再也不能供养植物，这个过程就叫做沙漠化。
Land sometimes becomes desert and can no longer support plants. This process is called desertification.
持续进行的全球暖化可能让目前仅存的一点点草原变成沙漠，就像雨林消失的模式一样。
Continued global warming could turn current marginal grasslands into deserts as rainfall patterns change.
表层土因为侵蚀而正在失去，可耕种的土地正在变成沙漠，被盐化，被城市化。
Topsoil is being lost to erosion, and arable land is being lost to desert, to salinization, and to urbanization.
同时，地球上可能会有近三分之一的地区变成沙漠，一半以上的地区经历干旱。
Meanwhile, nearly one-third of the planet could become desert and more than half would experience drought.
当森林里再也没有了树木，当动物们吃光了所有的草和植物，森林就将变成沙漠！
When there are no more trees in a forest and the animals eat the grass and small plants, the forest will become a desert!
这是发生在由于气候变化以及人们砍伐树木、开垦草地等使得陆地变成沙漠时的过程。
This is a process that happens when land becomes desert because of climate changes and because people cut down trees and dig up grass.
可是他们都变成沙漠里的牧民了，生活在苍天之下，黄土之上。他们可也喜欢这种生活。
But they had become nomads of the desert, living on the ground and under the sky, and they loved it.
莱拉坐在窗边，看着车外的景色从被白雪覆盖的山峰渐变成沙漠、峡谷，再变成被太阳烤得干裂的、盘踞在地面上的大岩石。
Through Laila's window, the landscape shifted from snowcapped peaks to deserts to canyons and sun-scorched 7 outcroppings of rocks.
在许多半干旱的地区中，同样存在树带界限的下限区域；在这片区域之内，由于缺乏水分，森林下沿区域的植被通常会逐渐变成干草原或沙漠。
In many semiarid areas there is also a lower timberline where the forest passes into steppe or desert at its lower edge, usually because of a lack of moisture.
考古学家安德鲁·史密斯认为，在这些情况下，随着干旱的持续，沙漠中较小的原牛群会变成更小、联系更加紧密的繁殖单位。
Under these circumstances, archaeologist Andrew Smith believes, the small herds of Bos primigenius in the desert became smaller, more closely knit breeding units as the drought took hold.
一路上，我们破坏了大多数我们曾经耕作过的的土地，经常把翠绿的自然生态区变成了半干旱的沙漠。
Along the way, we despoiled most of the land we worked, often turning verdant, natural ecozones into semi-arid deserts.
一路上，我们破坏了大多数我们曾经耕作过的的土地，经常把翠绿的自然生态区变成了半干旱的沙漠。
Along the way, we despoiled most of the land we worked, often turning verdant, natural ecozones into semi-arid deserts.
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