the young ibex instinctively run back to steeper ground. 羱羊幼仔便本能地奔回陡坡

30. But once on level ground, they're vulnerable.
    但回到平地上 他们就很容易遭到攻击
31. Red foxes lie in wait.
    赤狐埋伏许久了
32. At the first sign of danger,
    一有危险迹象
33. the young ibex instinctively run back to steeper ground.
    羱羊幼仔便本能地奔回陡坡
34. But heading for this particular rocky outcrop could be a mistake.
    但爬上这块突出的岩石可能是个错误
35. It's a 30-foot drop.
    这有九米高
36. The fox has them trapped...
    赤狐把它们困住了

来自《行星地球 第二季 第二集 Planet Earth S02E02 山脉》第 33 行