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There are large areas of land on every continent without rainfall and vegetation. It is estimated that more than% of the earth's suce is desert or desert. What's worse, if this trend continues, these deserts are expanding at an alarming rate every year, and in the near future, the sand will bury almost everything.
Two reasons explain the fact that deserts are spreading. The first reason is from nature. These areas are usually located far inland, where the rainfall will never reach the level.
The second reason is from many people themselves People regard immediate interests as the highest value, which leads to overgrazing, barren agriculture, tree cutting and open-pit mining. All these activities make the land unprotected. The rain washes the topsoil into the rivers and oceans, and the wind blows away the loose soil.
If we want to survive on this planet, we must stop the expansion of the desert. We can create deserts, and we can prevent them The first step is to plant a green belt on the edge of the desert, and the second step is to cover the desert with vegetation. This is another step that we hope human beings can work hard to develop better methods to control the spread of desert http://wwwicom > http://wwwwicom/html/gaokaoyingyu//html.
中文翻译：
在没有降雨和植被的每一个上都有的土地。据估计，地球表面超过%的土地是沙漠或沙漠。更糟糕的是，如果这种趋势持续下去，这些沙漠每年都以惊人的速度扩张，在不久的将来，沙子会掩埋几乎所有的东西两个原因解释了沙漠正在蔓延的事实第一个原因来自自然这些地区通常位于遥远的内陆，那里的降雨量永远达不到第二个原因来自于人类自身许多人把眼前的利益视为最高的价值，这导致过度放牧、贫瘠的农业、砍伐树木和露天开采所有这些活动都使土地得不到保护，雨水把表层土冲进河流和海洋，风吹走松散的土壤，如果我们要在这个星球上生存，就必须阻止沙漠的扩张人类可以造出沙漠，他还可以阻止它们的蔓延，停止放牧，贫瘠的耕作，砍伐树木，剥木条是第一步，在沙漠边缘种植一条绿带，第二步是用植被覆盖沙漠，这是我们希望人类能够努力开发更好的方法来治理蔓延的沙漠的另一步控制：http://wwwicom> http://wwwwicom/html/gaokaoyingyu//html。
We love the green world. The first scenic spot we visited was the desert botanical garden _Wow, there are a lot of strange cactus._ I was attracted by the shape of cactus, a small sphere, pillars, and people. I had a question in my heart: why can't cactus leaves solve the problem in my heart: suspect that they are their small body leaves? I excitedly said:“ It turns out that they are small spines, which are their leaves.
_Cacti keep water loss because they adapt to desert life. Not only are there no leaves from the desert botanical garden, we came to the second scenic spot: fossil forest, where there are high fossil trees everywhere. I put a tallest tree.
The fossil of the tree is much higher than the fossil tree. Now we also went to many scenic spots, this scene This autumn, I learned a lot of knowledge, let me find that nature has many secrets waiting for me to explore, we love the green world.
中文翻译：
：我们爱绿色的世界我们参观的第一个景区是沙漠植物园“哇，有很多奇形怪状的仙人掌”我被仙人掌的形状吸引了一个小小的球形，柱子，还有人，我心里有一个问题：仙人掌的叶子为什么不能解决我心中的问题：怀疑它们是它们小小的身体叶子我兴奋地说：“原来它们是小刺，是它们的叶子”仙人掌是由于适应沙漠生活而保持水分流失的，不仅没有叶子来自沙漠植物园，我们来到了第二个景点：化石森林，那里到处都是高高的化石树我放了一棵最高的树，树的化石比树的化石要高很多现在我们也去了很多景点，这个景点有绿色这个秋天我学到了很多知识，让我发现大自然有许多秘密等着我去探索，我们热爱绿色的世界。
An area of snow all year round, usually covered with cold deserts, or usually with limited desert cover, as opposed to the desert in warm regions, where cold deserts cover one sixth of the world's suce. It is estimated that warm deserts form a fifth of the world's land suce. Areas with annual rainfall of cm or less are considered deserts.
In some deserts, there is no rain at regular intervals. In some areas where the rainfall is as high as centimeter (CM), there is drought and semi desert. In these areas, evaporation is large and runoff loss is large.
The world's largest desert area lies between ° and ° north and south of the equator, where mountains block the path of trade winds, or high atmospheric pressure leads to downdraft and insufficient precipitation. Other factors contributing to desert formation include sunshine, water evaporation rate and temperature range. The temperature range in desert is usually extreme.
Desert plants have leaves and stems suitable for reducing water loss The distribution of individual plants is wider than that of plants in humid areas, and their roots form an extended network, sometimes penetrating underground. Animals that live in the North American desert are squirrels, mice, bats, foxes, rabbits, and deer reptiles, such as the Arizona coral snake, rattlesnake, desert tortoise, as well as horned toads, Gila monsters and many other lizards, such as cactus, wrens, runners, owls, sparrows, hawks and spiders, scorpions, termites and beetles.
中文翻译：
一个终年积雪的地区，通常被寒冷的沙漠覆盖，或者通常被有限的沙漠覆盖，与温暖地区的沙漠截然不同，寒冷的沙漠覆盖了世界表面的六分之一。据估计，温暖的沙漠形成了世界陆地表面的五分之一。年降雨量在厘米或以下的地区被认为是沙漠。
The great wall of China is one of the greatest wonders in the world. It has been listed as a world heritage site by UNESCO. It is like a giant dragon, winding from east to west across deserts, grasslands, mountains and plateaus, stretching for about KM miles.
It has a long history. Some parts of the City have become ruins or even completely disappeared. However, due to its magnificent architecture and historical significance, it is still one of the most attractive attractions in the world.
中文翻译：
中国长城是世界上最伟大的奇观之一，被教科文组织列入世界遗产，它就像一条巨龙，从中国的东西方向蜿蜒起伏，横跨沙漠、草原、山脉和高原，绵延约公里英里，有着多年的历史，长城的一些部分已经成为废墟，甚至完全消失了。然而，由于其宏伟的建筑和历史意义，它仍然是世界上最具吸引力的景点之一。
(the desert is expanding There are large areas of land on every continent without rainfall and vegetation. It is estimated that more than% of the land on the earth's suce is desert or desert, and what's worse, if this trend continues, these deserts will expand at an alarming rate every year, and in the near future the sand will bury almost everything. Two reasons explain the fact that deserts are spreading.
The first reason comes from nature. These areas are usually located far inland, where the rainfall is The second reason is that human beings themselves regard immediate interests as the highest value. As a result, in overgrazing, barren agriculture, tree cutting and open-pit mining, all of these activities leave land unprotected.
As a result, rainwater washes topsoil into rivers and oceans, and the wind blows away loose soil. If we want to survive on this planet, we must stop the expansion of deserts. Man can make deserts.
He can also stop their spread, stop grazing, barren farming, cutting down trees and stripping trees. The first step is to plant a green belt on the edge of the desert. The second step is to cover the desert with vegetation.
This is what we hope human beings can work hard to develop better methods to control it Another step to control the spreading desert.
中文翻译：
（沙漠正在扩张……在没有降雨和植被的每一个上都有的土地。据估计，地球表面超过%的土地是沙漠或沙漠，更糟糕的是，如果这种趋势持续下去，这些沙漠每年以惊人的速度扩张，在不久的将来沙子会掩埋几乎所有的东西两个原因解释了沙漠正在蔓延的事实第一个原因来自自然这些地区通常位于遥远的内陆地区，那里的降雨量永远达不到第二个原因来自于人类自身许多人把眼前的利益视为最高的价值，这就是结果在过度放牧、贫瘠的农业、砍伐树木和露天采矿中，所有这些活动都使土地得不到保护。因此，雨水将表土冲进河流和海洋，风吹走松散的土壤。
如果我们要在这个星球上生存，就必须阻止沙漠的扩张，人类可以制造沙漠，他还可以阻止它们的蔓延，停止放牧，贫瘠的耕作，砍伐树木，剥木条是第一步，在沙漠边缘种植一条绿带，第二步是用植被覆盖沙漠，这是我们希望人类能够努力开发更好的方法来治理蔓延的沙漠的另一步控制。
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Do you think the desert is a hot and dry place? The sand extends as far as you can see. This is true of the Sahara desert in North Africa, but most of the deserts are not dry, but some of the deserts are very cold. Plants and animals live in most deserts.
People have learned to live in deserts all over the world. The formation of the most deserts is due to the air flow on the earth. A large amount of dry air creates deserts.
For example, when air flows through mountains, it forms deserts When passing through mountains, water will squeeze out of the air and form desert on the other side of the mountain. Desert will also form along some coasts, where cold water flows. There are two main desert areas, north of the equator and south of the equator.
The equator is an imaginary line around the middle of the earth.
中文翻译：
你认为沙漠是一个炎热干燥的地方吗？那里的沙子延伸到你能看到的最远的地方。北非的撒哈拉沙漠就是这样，但大多数沙漠并不都是干的，但是有些沙漠是非常寒冷的植物和动物生活在大多数沙漠里人们学会了生活在全世界的沙漠中最沙漠的形成是因为地球上空气的流动大量的干空气造成了沙漠例如，当气流经过山脉时，会形成沙漠，当气流经过山脉时，水会从空气中挤出，在山的另一边形成沙漠，沙漠也会沿着一些海岸形成，那里有冷水流，有两个主要的沙漠地带，赤道以北，赤道以南，赤道是一条围绕地球中部的假想线。
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