advancing two and a half miles a day. 一天扩大2.5英里
The south polar skua is a formidable opportunist. 南极贼鸥是可怕的机会主义者
These are nunataks, the exposed peaks of vast mountain ranges buried in ice over a mile deep. 这些“冰原岛峰”下面是深埋在深达一英里的冰层里的庞大山脉
0nly in a land almost entirely covered in ice 只有在几乎完全被冰覆盖的陆地上
so bare rock is a vital commodity. 于是裸岩就成了最重要的繁殖地
the steady roar of a billion beating locust wings will once again be replaced by nothing more than the sound of the desert wind. 无数蝗虫拍打翅膀时的喧哗将不复存在 再次取代它的只是沙漠中呼啸的风声
and a whole swarm can consume literally hundreds of tonnes of vegetation. 而整团蝗虫云能消耗掉数百吨植物
A sudden flush of vegetation is what every desert dweller waits for, 植物的突然兴盛是 所有沙漠动物都盼望的事