What is a Desert什么是沙漠

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A desert is a landscape region that receives very little precipitation.沙漠是一个风景地区，收到很少降水。 For a peice of land to be classified as a desert it must receive less than 250 mm of precipitation per year.对于一块土地被归类为沙漠它必须得到小于250毫米的降水，每年。 Because of such a low level of precipitation deserts are known for supporting very little forms of life.由于这种低水平的降水沙漠被称为支持很少形式的生命。 With that said though, with a closer look deserts still have a wide variety of life.随着称，不过，与仔细看看沙漠仍然有各种各样的生活。 These desert creatures normally remain hidden, especially true during the daylight hours, to preserver moisture.这些沙漠动物通常是隐藏的，尤其是在白天，以保存水分。

Roughly one third of the world's land surface is desert.大约三分之一的世界陆地面积是沙漠。 Most commonly deserts around the world have similar characteristics.最常见的沙漠世界各地也有类似的特点。 Sand Dunes can often times be present in deserts as the desert soil is mostly comprised of sand.沙丘可以经常出现在沙漠的沙漠土壤主要是由沙子。 Typically rocky terrain will be exposed in certain regions, which will reveal a sparseness of vegetation, and soil development.通常情况下岩石地形将暴露在某些地区，这将显示出稀疏的植被和土壤的发展。 Wind driven forces are major factors in what shape desert landscapes .风驱动力量的主要因素在什么形状的沙漠景观。

Some of the largest and most known deserts in the world include:一些最大和最知名的沙漠是世界上包括：

Sahara西撒哈拉
Kalahari卡拉哈里
Namib纳米布
Judean Desert朱迪亚沙漠
Simpson Desert辛普森沙漠
Great Sandy Desert大沙沙漠
Sturt's Stony Desert特的石质沙漠
Little Desert小沙漠
Taklamakan塔克拉玛干沙漠
Rangipo Desert朗基普沙漠

Often times, deserts contain valuable mineral deposits.很多时候，沙漠含有宝贵的矿藏。 These are often regions that were formed in the arid environment or that were exposed by erosion.这些地区往往形成了在干旱的环境，或受到侵蚀。 Deserts are also ideal locations for human artifacts and fossils to be preserved because of their dry climate.沙漠也是理想的地点为人类化石和文物加以保存，因为它们干燥的气候。

Most of the major deserts of the world are trade wind deserts which means that: dry winds dissipate cloud cover, which in turn allows more sunlight to heat the land.大部分主要的沙漠世界贸易风沙漠，这意味着：干风驱散云层，这反过来又使更多的太阳光热的土地。 The second largest desert in the world, the Sahara of North Africa, which has seen temperatures as high as 56°C, is a trade wind desert.第二大沙漠的世界，撒哈拉北非，它看到温度高达56 ℃ ，是一个贸易风沙漠。

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