Average precipitation and temperature are the major factors determining whether a particular land area is a desert, grassland, or forest (climate-and-vegetation principle).
Average precipitation and temperature are the major factors determining whether a particular land area is a desert, grassland, or forest (climate-and-vegetation principle).
平均降雨量及温度是决定，对一个特定土地範围，形成砂漠、草原、或森林的主要因素。