Do you think of a desert as a hot, dry place where sand stretches as far as you can see? The Sahara in North Africa is like that, but most deserts are not. All deserts are dry, but some deserts are very cold. Plants and animals live in most deserts. People have learned to live in deserts all over the world.
Most deserts form because of air movements over the planet. Masses of dry air create deserts. For example, deserts can form where air currents go over mountains. Water gets squeezed out of the air as it passes over the mountains, and a desert forms on the other side of the mountains. Deserts can also form along some seacoasts where there are currents of cold water. There are two main bands of desert areas, one north of the equator and one south of the equator. The equator is an imaginary line that goes around Earth’s middle.
好的，我的翻译也是仅供参考
你认为沙漠是个很热，很干燥，满眼都是沙子的地方么？北非的萨哈拉沙漠是这样的，但是大部分沙漠都不是。所有的沙漠都很干燥，但是有些沙漠是寒冷的。植物和动物都可以住在沙漠里，世界各地的人们也已经学会住在沙漠。
大部分沙漠的来源是地球表面的空气运动，干燥空气制造了沙漠。比方说，沙漠可以来自于风搬运了山上的沙土。水被从空气中凝结出来被山遮挡，另一面就是沙漠。沙漠也会在一些寒冷的沿海地区有冷水的中央地带出现。一般都有一个区域在北边一个在南边。那个区域一般都在大陆的中间。
