The female calls them, 母熊召唤着熊崽

29. Perhaps to clean her fur,
    也许是为了清洁皮毛
30. perhaps for sheer joy.
    也许只是因为高兴
31. Her cubs gaze out of their bright new world for the very first time.
    它的幼熊们第一次注视着 这个明亮的新世界
32. The female calls them,
    母熊召唤着熊崽
33. but this steep slope is not the easiest place to take your first steps.
    但在这个陡峭的斜坡上 踏出第一步可不太容易
34. But they are hungry
    可是它们太饿了
35. and eager to reach their mother,
    急切盼着来到母亲身旁

来自《行星地球 第一季 第一集 Planet Earth S01E01 从北极到南极》第 32 行