The heaviest sand rises only a few metres above the ground, 最重的沙子只能离开地面几米
but the dust can be blown 5,000 metres up into the sky. 但是尘埃却能被吹上5000多米高的天空
The ferocious wind, armed with grains of sand, 夹杂着沙粒的强风
is the agent that shapes all deserts. 塑造了各种沙漠地形
and reduce visibility for days over areas the size of Britain. 所到之处能见度骤降为零 几天内横扫的地区比英国还大
strange formations are exposed in the naked rock. 裸露的岩石显露出奇特的造型
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
and the biggest source of sand and dust in the entire world. 也是全世界最大的沙尘源
leaving little for the land on the other side. 只有一小部分到达另一边的土地