and so provide shelter to those taking their turn in the middle. 以便保护轮流站在中间的企鹅
to face the coldest, darkest winter on Earth. 来抵抗这地球上最寒冷、最黑暗的冬天
They lock together in tightly-packed huddles as they struggle to keep warm. 它们紧紧挤成包围圈以此取暖
Crammed into this scrum, the birds are remarkably good-natured. But they have to be. 这些企鹅性情特别温和 这是环境使然
the exhausted females now return to the ocean on their own, 精疲力竭的雌企鹅们独自返回海洋
The females no longer have the energy to incubate. 雌企鹅再也没有孵蛋的力气
The brief courtship complete, there isn't a moment to lose. 短暂的求偶完成 不浪费一分钟
any male would struggle to stay on top. 任何雄企鹅都会拼命留在上面