here in their natural home they form great forests 它们在大自然中形成大片灌木林
they can always descend to lower warmer altitudes 便会搬迁到温暖的低海拔地区
if they tire of tree bark and other survival food 如果它们厌倦了树皮和其它残存的食物
and when the cold bites they have these upper slopes to themselves. 每当严寒袭来 这些山坡就成了它们的天下
Yet they gather in some numbers on these apparently barren slopes. 然而却有一定数量的灰熊 聚集在这片不毛之地
The slopes of the Rockies, bleak though they are, 尽管落基山地荒凉凄冷
Further north, they hold other dangers. 在更远的北方 它们还潜藏着其它危险
they still rely on her for their food. 它们仍需要依靠母狮获取食物