They migrate thousands of kilometres to find stable sea ice during Antarctic summer to wait out what is called a "catastrophic moult" every year.
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。关于这个话题，同城约会提供了深入分析
第十一条 对在原子能研究、开发和利用活动中做出突出贡献的单位和个人，按照国家有关规定给予表彰、奖励。
"We know that very well from later periods, but in this very formative period of history, it's not very well understood. So it's a really exciting opportunity."