pasture 和 prairie 和 steppe 有什么区别？如果难以说明的话，请教我一下例句。

A pasture is land covered with small plants and grass that feed domestic livestock. Pastures are used for grazing animals who eat the grass, such as cattle. A prairie is a grassland ecosystem. Prairies are home to short and tall grass as well as wild animals. Prairies are natural and have very few trees. Most places that are called prairies are in North America. Prairies can be considered a type of steppe ecosystem. Steppes are flat plains with very few trees. They are drier than forests, but not as dry as deserts. Much of Central Asia is a steppe region.