- A steep slope makes the best site for a den,
陡峭的斜坡是穴居的好地点
- but it's a tricky place to take your first steps.
但第一次踏出脚时是不能掉以轻心的
- It may look like fun but this is serious training for the task ahead.
可能看起来很好玩, 但这都是为马上来临的严峻挑战所做的训练
- There is no food on the slopes
山坡上面没有食物
- and the family will need to head out across the frozen sea before the mother's milk runs dry.
在母熊奶水干涸之前 一家人需要穿越冰封的海洋
- Two weeks later, they are ready.
两周后它们做好了准备
- 0ut on the sea ice, the female can hunt for seals
雌熊有可能在海冰上捕食到海豹
来自《行星地球 第一季 第六集 Planet Earth S01E06 冰雪世界》第 184 行