1. They have been herding cattle on the plateau for generations.
    他们世世代代在这高原上放牧。

2. The entrance to the cave is on a plateau in the Dauphine Alps.
    此洞的洞口在丹芬阿尔卑斯山的高原上，

3. The annual flooding is caused by the melting snows on the high Ethiopian plateau, from where the Nile originates.
    尼罗河发源于埃塞俄比亚高原，那里融化的冰雪致使河水年年泛滥。

4. After entering the narrow gap on the plateau, they climbed down the steep sides of the cave until they came to a narrow corridor.
    他们从高原上的窄缝进去，顺着笔直陡峭的洞壁往下爬。