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

102. where he can keep it warm.
     可以让蛋保持足够的温度
103. It requires an extraordinary piece of teamwork.
     交接过程需要双方高度的配合
104. Driven by hunger,
     在饥饿的驱使下
105. 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
106. repeating the epic journey they made with the males only a month before.
     再次踏上了1月前曾和雄企鹅共同走过的漫漫征途
107. Now the sun barely appears above the horizon.
     现在太阳只能勉强升到地平线上方
108. As the days shorten, its warmth is withdrawn from the continent.
     随着白昼的缩短,南极大陆变得越来越冷

来自《行星地球 第一季 第六集 Planet Earth S01E06 冰雪世界》第 105 行