The moment the musk ox spot the wolf, they instinctively form a defensive ring to shield their young.

麝牛一发现狼，它们就本能地组成防护圈保护幼崽。

Caribou, musk ox and polar bears all live in this icy area.

驯鹿、麝牛和北极熊都生活在这个冰冷的地区。