The calf is totally dependent on its mother. 幼鲸将完全依赖于它的母亲

137. This whale is here...
     这头鲸鱼来到这里
138. ..to give birth.
     是为了分娩
139. A new life begins.
     新的生活开始了
140. The calf is totally dependent on its mother.
     幼鲸将完全依赖于它的母亲
141. She's producing as much as 200 litres of milk a day.
     雌鲸每天分泌多达200升乳汁
142. The strength she loses, the calf gains.
     将自身的力量传递给了孩子
143. And it becomes more and more independent and playful.
     幼鲸得以越来越独立与活泼

来自《行星地球 第三季 第一集 Planet Earth S03E01 海岸》第 140 行