It's 20 feet up. 这有六米高

177. Here, steam from the river warms the surrounding trees,
     河里的热气温暖了周围的树林
178. so up in the branches, there could be prey.
     所以林子里可能有猎物
179. If only he could get to it.
     前提是他能爬得上去
180. It's 20 feet up.
     这有六米高
181. At last... a squirrel.
     最终收获一只松鼠
182. Not much, but enough to keep him going.
     不是很多 但是足以支撑他继续捕食
183. To survive a winter in these mountains takes tenacity,
     想要渡过山里的冬天需要坚韧不拔的意志

来自《行星地球 第二季 第二集 Planet Earth S02E02 山脉》第 180 行