Now they turn, blasting air from their blowholes, and ascend towards their prey. 现在座头鲸转身 利用呼吸孔吐气 喷向猎物
After laying their eggs, the petrels take time out to clean their plumage. 产蛋后雪海燕会在抽出时间在雪地里整理羽毛
These birds do not need to go to the ocean for their food. 贼鸥不需要到海洋里捕食
No bird will lay their eggs directly onto ice 企鹅不会把蛋直接下在冰面上
giant cathedrals of ice marked their entry into uncharted territory. 经过这里的冰山就标志他们进入了未知领域
They will consume every edible thing that lies in their path. 它们将把一路上能吃的东西 全部吃得精光
their development switches to the fast track. 它们的生长过程就会切换到快车道
It's a rare chance for them to build up their food reserves. 这是它们仅有的积累食物储备的机会
means that desert elephants can only refill their tanks once every four or five days. 意味着沙漠里的大象 只能每隔四五天喝饱一回