n.北极露脊鲸，弓头鲸

The bowhead whale is one of the largest whales on Earth.
这头弓头鲸是地球上最大的鲸鱼之一。
They observed a pod of bowhead whales migrating northward.
他们观察到一群弓头鲸向北迁徙。
The Inuit people have hunted bowhead whales for centuries.
因纽特人几个世纪以来一直捕猎弓头鲸。
Bowhead whales can live up to 200 years, making them one of the longest-living mammals.
弓头鲸可以活到200年，使它们成为寿命最长的哺乳动物之一。
Researchers estimate there are around 18,000 bowhead whales in the world.
研究人员估计全球大约有18,000头弓头鲸。
The bowhead whale's thick blubber layer helps it survive in frigid Arctic waters.
弓头鲸厚厚的脂肪层帮助它在冰冷的北极水域生存。
The distinctive bow-shaped head of the bowhead whale aids in its underwater navigation.
弓头鲸独特的弓形头部有助于其水下导航。
Conservation efforts have helped stabilize the bowhead whale population.
保护工作已帮助稳定了弓头鲸的数量。
Bowhead whales are an important part of the Arctic ecosystem and food chain.
弓头鲸是北极生态系统和食物链的重要组成部分。
The sound produced by bowhead whales is among the lowest-pitched of any animal on Earth.
弓头鲸发出的声音是地球上最低音调的动物声音之一。