The truth was that polar bears are ferocious wild animals and can become desperate for food in the ice-free summer months.
事实上北极熊是凶猛的野生动物，在无冰的夏季，北极熊会因难以觅食而变得饥不择食。
The truth was that polar bears are ferocious wild animals and can become desperate for food in the ice-free summer months.
事实上北极熊是凶猛的野生动物，在无冰的夏季，北极熊会因难以觅食而变得饥不择食。
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