But the mother faces a dilemma: 母熊面临着一个进退两难的选择

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
112. But the mother faces a dilemma:
     母熊面临着一个进退两难的选择
113. it's six months since she last fed
     它已经6个月没有吃东西了
114. and her milk is starting to run dry.
     它的乳汁也即将耗尽
115. She must soon leave the safety of these nursery slopes
     它必须尽快离开这个安全的斜坡“托儿所”

来自《行星地球 第一季 第二集 Planet Earth S01E02 山地》第 112 行