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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建立完善的安全管理体系，定期进行安全评估和渗透测试至关重要。
Number (12): Everything in this space must add up to 12. The answer is 2-6, placed vertically; 6-1, placed vertically.