and the family will need to head out across the frozen sea before the mother's milk runs dry. 在母熊奶水干涸之前 一家人需要穿越冰封的海洋
the sea floor is carpeted with dense mussel beds. 布满了密密麻麻的贻贝
a permanent hole in the sea ice, kept open throughout the winter by strong ocean currents. 冰间湖是结冰的海洋上永久性的洞孔 因为有强大的洋流使它们冬天也不会冰封
the Arctic is a vast frozen sea surrounded by land. 北极是广阔的冰封海洋 被陆地包围
Instead of waiting for the summer melt, the new arrivals hasten south over the frozen sea. 还没等到夏季解冻期的来临 这些鸟儿就急急忙忙从冰封的海洋赶到南极
The secret is a cold sea current that runs parallel to the land. 答案就是一股与陆地平行的寒冷洋流
Now lumps of heavily eroded rocks have been marooned in a sea of sand. 现在 这些严重侵蚀的石块 已被放逐在沙海之中
so most sea caves are created by the mechanical pounding of the waves. 所以大部分海洋洞窟 是在海浪的机械冲击下形成的
The rocky outcrops of New Zealand's Poor Knight Islands are riddled with sea caves 新西兰坡·骑士岛的 岩礁下布满了海蚀洞