But big animals find it difficult to get about here. 不过大型动物很难爬到这个地方

105. and take their first steps in the outside world.
     第一次踏足这个陌生的户外世界
106. These steep slopes provide a sanctuary for the cubs.
     这些陡峭的斜坡也是小熊的庇护所
107. A male bear would kill and eat them given the chance.
     公熊只要有机会就会吃掉它们
108. But big animals find it difficult to get about here.
     不过大型动物很难爬到这个地方
109. Males may be twice the size of a female
     公熊体型可能是母熊的2倍
110. and even she can have problems.
     但即使是母熊也已是举步艰难
111. Her cubs, however, make light of the snow and of life in general.
     可是它的幼崽在雪地里却是轻松自如 体型也和一般动物差不多

来自《行星地球 第一季 第二集 Planet Earth S01E02 山地》第 108 行