That is the way things are on grasslands across the planet. 地球上的草原都是如此
The world's deserts are growing bigger, hotter and drier, 世界沙漠的面积在扩大 温度更高 更加干燥
Some of the Namib's dunes are 1,000 feet high, 纳米布的沙丘有些高达三百米
both predator and prey are effectively blind, 猎食者和猎物都丧失了视力
but there are so few of these in the desert 但在沙漠中飞虫数量极少
where the sand grains are so perfectly dry and polished, 沙粒干燥光滑的地区
But there are signs on the sand that can give it away. 但沙子的移动 却泄露了它的行踪