With no cloak of vegetation to conceal them 由于没有植被覆盖

44. leaving little for the land on the other side.
    只有一小部分到达另一边的土地
45. From the space deserts are very conspicuous.
    从太空中看 沙漠非常显眼
46. Dunes of sand hundreds of miles long streak their surface.
    绵延数百英里的沙丘像是一条条皱边花纹
47. With no cloak of vegetation to conceal them
    由于没有植被覆盖
48. strange formations are exposed in the naked rock.
    裸露的岩石显露出奇特的造型
49. Africa's Sahara is the largest desert of all.
    非洲的撒哈拉沙漠是世界上最大的沙漠
50. It's the size of the United States
    它的面积相当于美国

来自《行星地球 第一季 第五集 Planet Earth S01E05 沙漠》第 47 行