these precious drops are life-savers for many different creatures. 这些宝贵的水滴是许多动物的救命物资
Before long the cacti are dripping with dew. 不久之后 雾凝结成了露水
that moisture loving lichens are able to grow on the cacti 就连喜湿的地衣也能在仙人掌上生长
These are South America's camels, guanacos. 这些是南美洲的骆驼——原驼
even though their shells are actually watertight. 尽管它们的外壳其实并不透水
In fact, most small desert creatures are nocturnal. 事实上 大多数小型沙漠动物 都是夜行动物
The blue areas on the body are the cooler parts. 身上蓝色的部分是较冷的部位
These outcrops are standing in Egypt's White Desert. 这些石头如今矗立在埃及的白色沙漠中
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
so it's only the tops that are moving. 所以沙丘移动的部分只是顶部