These sand scenes can be hundreds of miles across. 这些沙漠布景可宽达数百英里

61. The only escape is below the surface.
    唯一的藏身之处当然是在沙子下面
62. As the winds rise and fall, swallow and eddy
    随着风的起落、侵蚀和旋绕
63. so they pile the sand into dunes.
    沙子被堆成了一座座沙丘
64. These sand scenes can be hundreds of miles across.
    这些沙漠布景可宽达数百英里
65. In Namibia the winds have built some of the biggest dunes in the world.
    在纳米比亚 风塑造了 一些世界上最大的沙丘
66. Star dunes like these can be 300 metres high.
    这些巨型沙丘高达300多米
67. Grains, swept up the flanks, are blown off the crests of the ridges
    斜坡上吹起的沙粒 在沙丘顶部的边棱处飞扬

来自《行星地球 第一季 第五集 Planet Earth S01E05 沙漠》第 64 行