从长城西起的嘉峪关到莫高窟所在的敦煌有近400公里的路程,其中,大部分为茫茫的戈壁滩。久居内地的人们大多分不清戈壁与沙漠的区别,以为戈壁就是沙漠,沙漠也就是戈壁。其实,戈壁与沙漠有着明显的不同。沙漠的组成全是细沙,而戈壁的表面则为砂砾或卵石,底下则是土壤。只要有水,戈壁滩可以改造成绿洲;而沙漠的改造却很难。旅行车在白练似的公路上颠簸,犹如腾云驾雾一般。戈壁滩上的风光 From Jiayuguan in the west of the Great Wall to Dunhuang, where Mogao Grottoes is located, nearly 400 kilometers away, most of which are vast Gobi Desert. Most people living in the Mainland for most of the time can not tell the difference between the desert and the desert, that the desert is the desert, the desert is the desert. In fact, Gobi and the desert have obvious differences. The composition of the desert is all fine sand, and Gobi’s surface is gravel or pebbles, the bottom is the soil. As long as there is water, the Gobi Desert can be transformed into an oasis; however, the transformation of the desert is very difficult. Wagon white bumpy road in the rough, like a cloud-like fog. Gobi desert scenery