back at their traditional breeding grounds at last. 返回了它们阔别已久的繁殖地
Beyond the limits of the last tree, the planet is barren and ice-locked. 在最后一批树木以外的地方, 处处是冰天雪地 一片荒芜
Thirty days after it last set, the sun rises once more on Antarctica. 南极洲的太阳在落山30天后 再次升起
But this situation won't last long. 但是这种情况不会持续多久
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
Since the last Ice Age they've become cut off from the outside world. 自从上一个冰川期以来 它们便已和外界隔绝