从东非大裂谷说起 我们人类居住的美丽的地球表层,是由各种各样岩石组成的一个薄薄的壳层,它只有几十公里厚,这一层我们平常就称它为地壳。在这里有峭岩陡立的峰峦,有坦荡如砥的平川,有崎岖不平的高原,有激流湍急的峡谷,还有乱石峥嵘的戈壁……,真是气势磅礴,气象万千。 Speaking from the Great Rift Valley in East Africa, the beautiful Earth’s surface where we live is a thin shell made up of a variety of rocks, only a few tens of kilometers thick, which we usually call the crust. Here are steep peaks of steep peaks, a magnanimous flat river, rugged plateau, rapids rapids, as well as towering Gobi storming ... ... is really magnificent and spectacular.