Huge, blubbery and a bit grumpy. Walruses2 are easy enough to spot. But thanks to their remote Arctic location, they're hard to count, and we don't know how many of these giant beasts there are.
大块头，胖嘟嘟，还有点性情乖戾。海象很容易被发现，但由于它们住在偏远的北极地区，所以很难统计其数量，我们也不知道究竟有多少这种体型庞大的动物。
Now, using satellite images, the plan is to locate every Atlantic and Laptev Sea Walrus1, and scientists say this is essential, because climate change means these animals are under threat.
如今，这个计划旨在利用卫星图像定位每一只大西洋海象和拉普捷夫海象，科学家表示这是必要的，因为气候变化意味着这种动物受到了威胁。
Peter Fretwell, British Antarctic Survey
The sea ice on which they live most of the year is rapidly diminishing and they are having to change their behaviour and come out onto land much more often. That's almost certainly got some detrimental3 effect on them, but we're not sure how much their population is being affected4 by that. Hopefully, this project will tell us that important information.
彼得·弗雷特韦尔 英国南极调查局
“海象一年中大部分时间赖以生存的海冰正在迅速缩减，所以它们不得不改变行为，更频繁地到陆地上。几乎可以肯定，
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