so they empty their moisture on the mountain slopes, 水汽在山坡上逐渐凝结
The Gobi, hostile though it is, is their last stronghold. 戈壁尽管环境险恶 却是它们最后的据点
Their biggest problem is the lack of water, 它们最大的困难莫过于缺水
because of their ability to survive in such extreme conditions. 因为它们能在这种极端环境中生存
keeping their grip with microscopic hooks on their fins. 它们用鳍上的小钩紧紧抓住岩壁
Receptors in their skin detect minute movements in the water made by its prey. 皮肤上的探测器能觉察到 猎物引起的最微小的水流变化
they have all not only lost the pigment in their skin, 它们不仅失去了皮肤色素
for their daytime sanctuary on the ground. 以换取它们白天在陆地上的庇护