Polar bear cub walking across pack ice, Arctic National Wildlife Refuge, Alaska (© Steven Kazlowski/naturepl.com)-学课文

日期：20260227 - Polar bear cub walking across pack ice, Arctic National Wildlife Refuge, Alaska (© Steven Kazlowski/naturepl.com)

Polar bear cub walking across pack ice, Arctic National Wildlife Refuge, Alaska (© Steven Kazlowski/naturepl.com)

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